diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index d16d8ab..547a221 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -82,23 +82,23 @@ model Card {
   id            String   @id @default(cuid())
   deckId        String
   userId        String
-  question      String
-  answer        String
-  grade         Int
-  shots         Int
+  question      String   @db.Text
+  answer        String   @db.Text
+  grade         Int      @default(0)
+  shots         Int      @default(0)
   questionImg   String?
   answerImg     String?
   answerVideo   String?
   questionVideo String?
   comments      String?
   type          String?
-  rating        Int
+  rating        Int      @default(0)
   moreId        String?
   created       DateTime @default(now())
   updated       DateTime @updatedAt
   user          User     @relation(fields: [userId], references: [id], onDelete: Cascade)
   decks         Deck     @relation(fields: [deckId], references: [id], onDelete: Cascade)
-  grades        Grade[] // One-to-many relation
+  grades        Grade[]
 
   @@index([userId])
   @@index([deckId])
diff --git a/src/app.module.ts b/src/app.module.ts
index e05adb1..7829472 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -9,6 +9,7 @@ import * as process from 'process'
 import { JwtRefreshStrategy } from './modules/auth/strategies/jwt-refresh.strategy'
 import { CqrsModule } from '@nestjs/cqrs'
 import { DecksModule } from './modules/decks/decks.module'
+import { CardsModule } from './modules/cards/cards.module'
 
 @Module({
   imports: [
@@ -17,6 +18,7 @@ import { DecksModule } from './modules/decks/decks.module'
     UsersModule,
     AuthModule,
     DecksModule,
+    CardsModule,
     PrismaModule,
 
     MailerModule.forRoot({
diff --git a/src/modules/cards/cards.controller.ts b/src/modules/cards/cards.controller.ts
new file mode 100644
index 0000000..774bd47
--- /dev/null
+++ b/src/modules/cards/cards.controller.ts
@@ -0,0 +1,29 @@
+import { Body, Controller, Delete, Get, Param, Patch, Req, UseGuards } from '@nestjs/common'
+import { CardsService } from './cards.service'
+import { UpdateCardDto } from './dto/update-card.dto'
+import { CommandBus } from '@nestjs/cqrs'
+import { DeleteDeckByIdCommand, GetDeckByIdCommand, UpdateDeckCommand } from './use-cases'
+import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard'
+
+@Controller('cards')
+export class CardsController {
+  constructor(private readonly decksService: CardsService, private commandBus: CommandBus) {}
+
+  @UseGuards(JwtAuthGuard)
+  @Get(':id')
+  findOne(@Param('id') id: string) {
+    return this.commandBus.execute(new GetDeckByIdCommand(id))
+  }
+
+  @UseGuards(JwtAuthGuard)
+  @Patch(':id')
+  update(@Param('id') id: string, @Body() updateDeckDto: UpdateCardDto, @Req() req) {
+    return this.commandBus.execute(new UpdateDeckCommand(id, updateDeckDto, req.user.id))
+  }
+
+  @UseGuards(JwtAuthGuard)
+  @Delete(':id')
+  remove(@Param('id') id: string, @Req() req) {
+    return this.commandBus.execute(new DeleteDeckByIdCommand(id, req.user.id))
+  }
+}
diff --git a/src/modules/cards/cards.module.ts b/src/modules/cards/cards.module.ts
new file mode 100644
index 0000000..ef0ca53
--- /dev/null
+++ b/src/modules/cards/cards.module.ts
@@ -0,0 +1,28 @@
+import { Module } from '@nestjs/common'
+import { CardsService } from './cards.service'
+import { CardsController } from './cards.controller'
+import { CqrsModule } from '@nestjs/cqrs'
+import {
+  CreateCardHandler,
+  DeleteDeckByIdHandler,
+  GetDeckByIdHandler,
+  GetAllCardsInDeckHandler,
+  UpdateDeckHandler,
+} from './use-cases'
+import { CardsRepository } from './infrastructure/cards.repository'
+
+const commandHandlers = [
+  CreateCardHandler,
+  GetAllCardsInDeckHandler,
+  GetDeckByIdHandler,
+  DeleteDeckByIdHandler,
+  UpdateDeckHandler,
+]
+
+@Module({
+  imports: [CqrsModule],
+  controllers: [CardsController],
+  providers: [CardsService, CardsRepository, ...commandHandlers],
+  exports: [CqrsModule],
+})
+export class CardsModule {}
diff --git a/src/modules/cards/cards.service.ts b/src/modules/cards/cards.service.ts
new file mode 100644
index 0000000..301e017
--- /dev/null
+++ b/src/modules/cards/cards.service.ts
@@ -0,0 +1,4 @@
+import { Injectable } from '@nestjs/common'
+
+@Injectable()
+export class CardsService {}
diff --git a/src/modules/cards/dto/create-card.dto.ts b/src/modules/cards/dto/create-card.dto.ts
new file mode 100644
index 0000000..d0d31ad
--- /dev/null
+++ b/src/modules/cards/dto/create-card.dto.ts
@@ -0,0 +1,9 @@
+import { Length } from 'class-validator'
+
+export class CreateCardDto {
+  @Length(3, 500)
+  question: string
+
+  @Length(3, 500)
+  answer: string
+}
diff --git a/src/modules/cards/dto/get-all-cards.dto.ts b/src/modules/cards/dto/get-all-cards.dto.ts
new file mode 100644
index 0000000..d2e7d96
--- /dev/null
+++ b/src/modules/cards/dto/get-all-cards.dto.ts
@@ -0,0 +1,13 @@
+import { Length } from 'class-validator'
+import { PaginationDto } from '../../../infrastructure/common/pagination/pagination.dto'
+import { IsOptionalOrEmptyString } from '../../../infrastructure/decorators/is-optional-or-empty-string'
+
+export class GetAllCardsInDeckDto extends PaginationDto {
+  @IsOptionalOrEmptyString()
+  @Length(1, 30)
+  question?: string
+
+  @IsOptionalOrEmptyString()
+  @Length(1, 30)
+  answer?: string
+}
diff --git a/src/modules/cards/dto/update-card.dto.ts b/src/modules/cards/dto/update-card.dto.ts
new file mode 100644
index 0000000..b9e5c31
--- /dev/null
+++ b/src/modules/cards/dto/update-card.dto.ts
@@ -0,0 +1,16 @@
+import { PartialType } from '@nestjs/mapped-types'
+import { CreateCardDto } from './create-card.dto'
+import { IsOptionalOrEmptyString } from '../../../infrastructure/decorators/is-optional-or-empty-string'
+import { IsBoolean } from 'class-validator'
+
+export class UpdateCardDto extends PartialType(CreateCardDto) {
+  @IsOptionalOrEmptyString()
+  name: string
+
+  @IsOptionalOrEmptyString()
+  @IsBoolean()
+  isPrivate: boolean
+
+  @IsOptionalOrEmptyString()
+  cover: string
+}
diff --git a/src/modules/cards/entities/cards.entity.ts b/src/modules/cards/entities/cards.entity.ts
new file mode 100644
index 0000000..4c092d2
--- /dev/null
+++ b/src/modules/cards/entities/cards.entity.ts
@@ -0,0 +1 @@
+export class Card {}
diff --git a/src/modules/cards/infrastructure/cards.repository.ts b/src/modules/cards/infrastructure/cards.repository.ts
new file mode 100644
index 0000000..eb410b9
--- /dev/null
+++ b/src/modules/cards/infrastructure/cards.repository.ts
@@ -0,0 +1,109 @@
+import { Injectable, InternalServerErrorException, Logger } from '@nestjs/common'
+import { PrismaService } from '../../../prisma.service'
+import { GetAllCardsInDeckDto } from '../dto/get-all-cards.dto'
+import {
+  DEFAULT_PAGE_NUMBER,
+  DEFAULT_PAGE_SIZE,
+} from '../../../infrastructure/common/pagination/pagination.constants'
+import { CreateCardDto } from '../dto/create-card.dto'
+
+@Injectable()
+export class CardsRepository {
+  constructor(private prisma: PrismaService) {}
+  private readonly logger = new Logger(CardsRepository.name)
+  async createCard(deckId: string, userId: string, card: CreateCardDto) {
+    try {
+      return await this.prisma.card.create({
+        data: {
+          user: {
+            connect: {
+              id: userId,
+            },
+          },
+          decks: {
+            connect: {
+              id: deckId,
+            },
+          },
+          ...card,
+        },
+      })
+    } catch (e) {
+      this.logger.error(e?.message)
+      throw new InternalServerErrorException(e?.message)
+    }
+  }
+
+  async findCardsByDeckId(
+    deckId: string,
+    {
+      answer = undefined,
+      question = undefined,
+      currentPage = DEFAULT_PAGE_NUMBER,
+      pageSize = DEFAULT_PAGE_SIZE,
+    }: GetAllCardsInDeckDto
+  ) {
+    try {
+      return await this.prisma.card.findMany({
+        where: {
+          decks: {
+            id: deckId,
+          },
+          question: {
+            contains: question || undefined,
+          },
+          answer: {
+            contains: answer || undefined,
+          },
+        },
+        skip: (currentPage - 1) * pageSize,
+        take: pageSize,
+      })
+    } catch (e) {
+      this.logger.error(e?.message)
+      throw new InternalServerErrorException(e?.message)
+    }
+  }
+  public async findDeckById(id: string) {
+    try {
+      return await this.prisma.deck.findUnique({
+        where: {
+          id,
+        },
+      })
+    } catch (e) {
+      this.logger.error(e?.message)
+      throw new InternalServerErrorException(e?.message)
+    }
+  }
+
+  public async deleteDeckById(id: string) {
+    try {
+      return await this.prisma.deck.delete({
+        where: {
+          id,
+        },
+      })
+    } catch (e) {
+      this.logger.error(e?.message)
+      throw new InternalServerErrorException(e?.message)
+    }
+  }
+
+  public async updateDeckById(
+    id: string,
+    data: { name?: string; cover?: string; isPrivate?: boolean }
+  ) {
+    try {
+      return await this.prisma.deck.update({
+        where: {
+          id,
+        },
+        data,
+      })
+    } catch (e) {
+      this.logger.error(e?.message)
+      throw new InternalServerErrorException(e?.message)
+    }
+  }
+}
diff --git a/src/modules/cards/use-cases/delete-deck-by-id-use-case.ts b/src/modules/cards/use-cases/delete-deck-by-id-use-case.ts
new file mode 100644
index 0000000..a0cbe48
--- /dev/null
+++ b/src/modules/cards/use-cases/delete-deck-by-id-use-case.ts
@@ -0,0 +1,21 @@
+import { CommandHandler, ICommandHandler } from '@nestjs/cqrs'
+import { CardsRepository } from '../infrastructure/cards.repository'
+import { BadRequestException, NotFoundException } from '@nestjs/common'
+
+export class DeleteDeckByIdCommand {
+  constructor(public readonly id: string, public readonly userId: string) {}
+}
+
+@CommandHandler(DeleteDeckByIdCommand)
+export class DeleteDeckByIdHandler implements ICommandHandler<DeleteDeckByIdCommand> {
+  constructor(private readonly deckRepository: CardsRepository) {}
+
+  async execute(command: DeleteDeckByIdCommand) {
+    const deck = await this.deckRepository.findDeckById(command.id)
+    if (!deck) throw new NotFoundException(`Deck with id ${command.id} not found`)
+    if (deck.userId !== command.userId) {
+      throw new BadRequestException(`You can't delete a deck that you don't own`)
+    }
+    return await this.deckRepository.deleteDeckById(command.id)
+  }
+}
diff --git a/src/modules/cards/use-cases/get-deck-by-id-use-case.ts b/src/modules/cards/use-cases/get-deck-by-id-use-case.ts
new file mode 100644
index 0000000..975b828
--- /dev/null
+++ b/src/modules/cards/use-cases/get-deck-by-id-use-case.ts
@@ -0,0 +1,15 @@
+import { CommandHandler, ICommandHandler } from '@nestjs/cqrs'
+import { CardsRepository } from '../infrastructure/cards.repository'
+
+export class GetDeckByIdCommand {
+  constructor(public readonly id: string) {}
+}
+
+@CommandHandler(GetDeckByIdCommand)
+export class GetDeckByIdHandler implements ICommandHandler<GetDeckByIdCommand> {
+  constructor(private readonly deckRepository: CardsRepository) {}
+
+  async execute(command: GetDeckByIdCommand) {
+    return await this.deckRepository.findDeckById(command.id)
+  }
+}
diff --git a/src/modules/cards/use-cases/index.ts b/src/modules/cards/use-cases/index.ts
new file mode 100644
index 0000000..8626b90
--- /dev/null
+++ b/src/modules/cards/use-cases/index.ts
@@ -0,0 +1,5 @@
+export * from '../../decks/use-cases/create-card-use-case'
+export * from '../../decks/use-cases/get-all-cards-in-deck-use-case'
+export * from './get-deck-by-id-use-case'
+export * from './delete-deck-by-id-use-case'
+export * from './update-deck-use-case'
diff --git a/src/modules/cards/use-cases/update-deck-use-case.ts b/src/modules/cards/use-cases/update-deck-use-case.ts
new file mode 100644
index 0000000..7ca9eb7
--- /dev/null
+++ b/src/modules/cards/use-cases/update-deck-use-case.ts
@@ -0,0 +1,29 @@
+import { CommandHandler, ICommandHandler } from '@nestjs/cqrs'
+import { CardsRepository } from '../infrastructure/cards.repository'
+import { UpdateCardDto } from '../dto/update-card.dto'
+import { BadRequestException, NotFoundException } from '@nestjs/common'
+
+export class UpdateDeckCommand {
+  constructor(
+    public readonly deckId: string,
+    public readonly deck: UpdateCardDto,
+    public readonly userId: string
+  ) {}
+}
+
+@CommandHandler(UpdateDeckCommand)
+export class UpdateDeckHandler implements ICommandHandler<UpdateDeckCommand> {
+  constructor(private readonly deckRepository: CardsRepository) {}
+
+  async execute(command: UpdateDeckCommand) {
+    const deck = await this.deckRepository.findDeckById(command.deckId)
+
+    if (!deck) throw new NotFoundException(`Deck with id ${command.deckId} not found`)
+
+    if (deck.userId !== command.userId) {
+      throw new BadRequestException(`You can't change a deck that you don't own`)
+    }
+
+    return await this.deckRepository.updateDeckById(command.deckId, command.deck)
+  }
+}
diff --git a/src/modules/decks/decks.controller.ts b/src/modules/decks/decks.controller.ts
index 4117da1..1c2c6b6 100644
--- a/src/modules/decks/decks.controller.ts
+++ b/src/modules/decks/decks.controller.ts
@@ -18,12 +18,16 @@ import { CommandBus } from '@nestjs/cqrs'
 import {
   CreateDeckCommand,
   DeleteDeckByIdCommand,
+  GetAllCardsInDeckCommand,
   GetAllDecksCommand,
   GetDeckByIdCommand,
   UpdateDeckCommand,
 } from './use-cases'
 import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard'
 import { GetAllDecksDto } from './dto/get-all-decks.dto'
+import { GetAllCardsInDeckDto } from '../cards/dto/get-all-cards.dto'
+import { CreateCardCommand } from './use-cases/create-card-use-case'
+import { CreateCardDto } from '../cards/dto/create-card.dto'
 
 @Controller('decks')
 export class DecksController {
@@ -48,6 +52,18 @@ export class DecksController {
     return this.commandBus.execute(new GetDeckByIdCommand(id))
   }
 
+  @UseGuards(JwtAuthGuard)
+  @Get(':id/cards')
+  findCardsInDeck(@Param('id') id: string, @Req() req, @Query() query: GetAllCardsInDeckDto) {
+    return this.commandBus.execute(new GetAllCardsInDeckCommand(req.user.id, id, query))
+  }
+
+  @UseGuards(JwtAuthGuard)
+  @Post(':id/cards')
+  createCardInDeck(@Param('id') id: string, @Req() req, @Body() card: CreateCardDto) {
+    return this.commandBus.execute(new CreateCardCommand(req.user.id, id, card))
+  }
+
   @UseGuards(JwtAuthGuard)
   @Patch(':id')
   update(@Param('id') id: string, @Body() updateDeckDto: UpdateDeckDto, @Req() req) {
diff --git a/src/modules/decks/decks.module.ts b/src/modules/decks/decks.module.ts
index d4bf65a..5167c4a 100644
--- a/src/modules/decks/decks.module.ts
+++ b/src/modules/decks/decks.module.ts
@@ -8,8 +8,11 @@ import {
   GetDeckByIdHandler,
   GetAllDecksHandler,
   UpdateDeckHandler,
+  GetAllCardsInDeckHandler,
 } from './use-cases'
 import { DecksRepository } from './infrastructure/decks.repository'
+import { CardsRepository } from '../cards/infrastructure/cards.repository'
+import { CreateCardHandler } from './use-cases/create-card-use-case'
 
 const commandHandlers = [
   CreateDeckHandler,
@@ -17,12 +20,14 @@ const commandHandlers = [
   GetDeckByIdHandler,
   DeleteDeckByIdHandler,
   UpdateDeckHandler,
+  GetAllCardsInDeckHandler,
+  CreateCardHandler,
 ]
 
 @Module({
   imports: [CqrsModule],
   controllers: [DecksController],
-  providers: [DecksService, DecksRepository, ...commandHandlers],
+  providers: [DecksService, DecksRepository, CardsRepository, ...commandHandlers],
   exports: [CqrsModule],
 })
 export class DecksModule {}
diff --git a/src/modules/decks/use-cases/create-card-use-case.ts b/src/modules/decks/use-cases/create-card-use-case.ts
new file mode 100644
index 0000000..57fac32
--- /dev/null
+++ b/src/modules/decks/use-cases/create-card-use-case.ts
@@ -0,0 +1,20 @@
+import { CommandHandler, ICommandHandler } from '@nestjs/cqrs'
+import { CreateCardDto } from '../../cards/dto/create-card.dto'
+import { CardsRepository } from '../../cards/infrastructure/cards.repository'
+
+export class CreateCardCommand {
+  constructor(
+    public readonly userId: string,
+    public readonly deckId: string,
+    public readonly card: CreateCardDto
+  ) {}
+}
+
+@CommandHandler(CreateCardCommand)
+export class CreateCardHandler implements ICommandHandler<CreateCardCommand> {
+  constructor(private readonly cardsRepository: CardsRepository) {}
+
+  async execute(command: CreateCardCommand) {
+    return await this.cardsRepository.createCard(command.deckId, command.userId, command.card)
+  }
+}
diff --git a/src/modules/decks/use-cases/get-all-cards-in-deck-use-case.ts b/src/modules/decks/use-cases/get-all-cards-in-deck-use-case.ts
new file mode 100644
index 0000000..912daa4
--- /dev/null
+++ b/src/modules/decks/use-cases/get-all-cards-in-deck-use-case.ts
@@ -0,0 +1,28 @@
+import { CommandHandler, ICommandHandler } from '@nestjs/cqrs'
+import { CardsRepository } from '../../cards/infrastructure/cards.repository'
+import { GetAllCardsInDeckDto } from '../../cards/dto/get-all-cards.dto'
+import { ForbiddenException, NotFoundException } from '@nestjs/common'
+
+export class GetAllCardsInDeckCommand {
+  constructor(
+    public readonly userId: string,
+    public readonly deckId: string,
+    public readonly params: GetAllCardsInDeckDto
+  ) {}
+}
+
+@CommandHandler(GetAllCardsInDeckCommand)
+export class GetAllCardsInDeckHandler implements ICommandHandler<GetAllCardsInDeckCommand> {
+  constructor(private readonly cardsRepository: CardsRepository) {}
+
+  async execute(command: GetAllCardsInDeckCommand) {
+    const deck = await this.cardsRepository.findDeckById(command.deckId)
+    if (!deck) throw new NotFoundException(`Deck with id ${command.deckId} not found`)
+
+    if (deck.userId !== command.userId && deck.isPrivate) {
+      throw new ForbiddenException(`You can't get a private deck that you don't own`)
+    }
+
+    return await this.cardsRepository.findCardsByDeckId(command.deckId, command.params)
+  }
+}
diff --git a/src/modules/decks/use-cases/index.ts b/src/modules/decks/use-cases/index.ts
index 1324f7f..1a8b55d 100644
--- a/src/modules/decks/use-cases/index.ts
+++ b/src/modules/decks/use-cases/index.ts
@@ -3,3 +3,4 @@ export * from './get-all-decks-use-case'
 export * from './get-deck-by-id-use-case'
 export * from './delete-deck-by-id-use-case'
 export * from './update-deck-use-case'
+export * from './get-all-cards-in-deck-use-case'