diff --git a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/ResourcesPool.java b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/ResourcesPool.java
index 42cb9b4..9d5ef12 100644
--- a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/ResourcesPool.java
+++ b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/ResourcesPool.java
@@ -5,8 +5,6 @@
 import com.dddheroes.heroesofddd.resourcespool.write.withdraw.CannotWithdrawMoreThanDepositedResources;
 import com.dddheroes.heroesofddd.resourcespool.write.withdraw.ResourcesWithdrawn;
 import com.dddheroes.heroesofddd.resourcespool.write.withdraw.WithdrawResources;
-import com.dddheroes.heroesofddd.shared.Amount;
-import com.dddheroes.heroesofddd.shared.ResourceType;
 import com.dddheroes.heroesofddd.shared.Resources;
 import org.axonframework.commandhandling.CommandHandler;
 import org.axonframework.eventsourcing.EventSourcingHandler;
@@ -27,28 +25,28 @@ class ResourcesPool {
     @CommandHandler
     @CreationPolicy(AggregateCreationPolicy.CREATE_IF_MISSING)
     void decide(DepositResources command) {
-        apply(ResourcesDeposited.event(command.resourcesPoolId(), command.type(), command.amount()));
+        apply(ResourcesDeposited.event(command.resourcesPoolId(), command.resources()));
     }
 
     @EventSourcingHandler
     void evolve(ResourcesDeposited event) {
         resourcesPoolId = new ResourcesPoolId(event.resourcesPoolId());
-        this.balance = balance.plus(ResourceType.from(event.type()), new Amount(event.amount()));
+        this.balance = balance.plus(Resources.fromRaw(event.resources()));
     }
 
     @CommandHandler
     void decide(WithdrawResources command) {
         new CannotWithdrawMoreThanDepositedResources(
                 balance,
-                Resources.from(command.type(), command.amount())
+                command.resources()
         ).verify();
-        apply(ResourcesWithdrawn.event(command.resourcesPoolId(), command.type(), command.amount()));
+        apply(ResourcesWithdrawn.event(command.resourcesPoolId(), command.resources()));
     }
 
     @EventSourcingHandler
     void evolve(ResourcesWithdrawn event) {
         resourcesPoolId = new ResourcesPoolId(event.resourcesPoolId());
-        this.balance = balance.minus(ResourceType.from(event.type()), new Amount(event.amount()));
+        this.balance = balance.minus(Resources.fromRaw(event.resources()));
     }
 
     ResourcesPool() {
diff --git a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/deposit/DepositResources.java b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/deposit/DepositResources.java
index afbedbd..fa95c66 100644
--- a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/deposit/DepositResources.java
+++ b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/deposit/DepositResources.java
@@ -2,18 +2,22 @@
 
 import com.dddheroes.heroesofddd.resourcespool.write.ResourcesPoolCommand;
 import com.dddheroes.heroesofddd.resourcespool.write.ResourcesPoolId;
-import com.dddheroes.heroesofddd.shared.Amount;
-import com.dddheroes.heroesofddd.shared.ResourceType;
+import com.dddheroes.heroesofddd.shared.Resources;
 import org.axonframework.modelling.command.TargetAggregateIdentifier;
 
+import java.util.Map;
+
 public record DepositResources(
         @TargetAggregateIdentifier
         ResourcesPoolId resourcesPoolId,
-        ResourceType type,
-        Amount amount
+        Resources resources
 ) implements ResourcesPoolCommand {
 
     public static DepositResources command(String resourcesPoolId, String type, Integer amount) {
-        return new DepositResources(ResourcesPoolId.of(resourcesPoolId), ResourceType.from(type), Amount.of(amount));
+        return command(resourcesPoolId, Map.of(type, amount));
+    }
+
+    public static DepositResources command(String resourcesPoolId, Map<String, Integer> resources) {
+        return new DepositResources(ResourcesPoolId.of(resourcesPoolId), Resources.fromRaw(resources));
     }
 }
diff --git a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/deposit/ResourcesDeposited.java b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/deposit/ResourcesDeposited.java
index 7eed6c3..71b0917 100644
--- a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/deposit/ResourcesDeposited.java
+++ b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/deposit/ResourcesDeposited.java
@@ -2,16 +2,16 @@
 
 import com.dddheroes.heroesofddd.resourcespool.write.ResourcesPoolEvent;
 import com.dddheroes.heroesofddd.resourcespool.write.ResourcesPoolId;
-import com.dddheroes.heroesofddd.shared.Amount;
-import com.dddheroes.heroesofddd.shared.ResourceType;
+import com.dddheroes.heroesofddd.shared.Resources;
+
+import java.util.Map;
 
 public record ResourcesDeposited(
         String resourcesPoolId,
-        String type,
-        Integer amount
+        Map<String, Integer> resources
 ) implements ResourcesPoolEvent {
 
-    public static ResourcesDeposited event(ResourcesPoolId resourcesPoolId, ResourceType type, Amount amount) {
-        return new ResourcesDeposited(resourcesPoolId.raw(), type.name(), amount.raw());
+    public static ResourcesDeposited event(ResourcesPoolId resourcesPoolId, Resources resources) {
+        return new ResourcesDeposited(resourcesPoolId.raw(), resources.raw());
     }
 }
diff --git a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/withdraw/ResourcesWithdrawn.java b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/withdraw/ResourcesWithdrawn.java
index e2078cb..81280bf 100644
--- a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/withdraw/ResourcesWithdrawn.java
+++ b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/withdraw/ResourcesWithdrawn.java
@@ -2,16 +2,16 @@
 
 import com.dddheroes.heroesofddd.resourcespool.write.ResourcesPoolEvent;
 import com.dddheroes.heroesofddd.resourcespool.write.ResourcesPoolId;
-import com.dddheroes.heroesofddd.shared.Amount;
-import com.dddheroes.heroesofddd.shared.ResourceType;
+import com.dddheroes.heroesofddd.shared.Resources;
+
+import java.util.Map;
 
 public record ResourcesWithdrawn(
         String resourcesPoolId,
-        String type,
-        Integer amount
+        Map<String, Integer> resources
 ) implements ResourcesPoolEvent {
 
-    public static ResourcesWithdrawn event(ResourcesPoolId resourcesPoolId, ResourceType type, Amount amount) {
-        return new ResourcesWithdrawn(resourcesPoolId.raw(), type.name(), amount.raw());
+    public static ResourcesWithdrawn event(ResourcesPoolId resourcesPoolId, Resources resources) {
+        return new ResourcesWithdrawn(resourcesPoolId.raw(), resources.raw());
     }
 }
diff --git a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/withdraw/WithdrawResources.java b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/withdraw/WithdrawResources.java
index e7babce..7b565ed 100644
--- a/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/withdraw/WithdrawResources.java
+++ b/src/main/java/com/dddheroes/heroesofddd/resourcespool/write/withdraw/WithdrawResources.java
@@ -2,18 +2,22 @@
 
 import com.dddheroes.heroesofddd.resourcespool.write.ResourcesPoolCommand;
 import com.dddheroes.heroesofddd.resourcespool.write.ResourcesPoolId;
-import com.dddheroes.heroesofddd.shared.Amount;
-import com.dddheroes.heroesofddd.shared.ResourceType;
+import com.dddheroes.heroesofddd.shared.Resources;
 import org.axonframework.modelling.command.TargetAggregateIdentifier;
 
+import java.util.Map;
+
 public record WithdrawResources(
         @TargetAggregateIdentifier
         ResourcesPoolId resourcesPoolId,
-        ResourceType type,
-        Amount amount
+        Resources resources
 ) implements ResourcesPoolCommand {
 
     public static WithdrawResources command(String resourcesPoolId, String type, Integer amount) {
-        return new WithdrawResources(ResourcesPoolId.of(resourcesPoolId), ResourceType.from(type), Amount.of(amount));
+        return command(resourcesPoolId, Map.of(type, amount));
+    }
+
+    public static WithdrawResources command(String resourcesPoolId, Map<String, Integer> resources) {
+        return new WithdrawResources(ResourcesPoolId.of(resourcesPoolId), Resources.fromRaw(resources));
     }
 }
diff --git a/src/main/java/com/dddheroes/heroesofddd/shared/Resources.java b/src/main/java/com/dddheroes/heroesofddd/shared/Resources.java
index 8051733..18f45e1 100644
--- a/src/main/java/com/dddheroes/heroesofddd/shared/Resources.java
+++ b/src/main/java/com/dddheroes/heroesofddd/shared/Resources.java
@@ -26,6 +26,14 @@ public Resources plus(ResourceType type, Amount amount) {
         return new Resources(newResources);
     }
 
+    public Resources plus(Resources additionalResources) {
+        return plus(additionalResources.raw);
+    }
+
+    public Resources minus(Resources additionalResources) {
+        return minus(additionalResources.raw);
+    }
+
     public Resources minus(ResourceType type, Amount amount) {
         Map<ResourceType, Amount> newResources = new HashMap<>(this.raw);
         newResources.merge(type, amount, Amount::minus);
diff --git a/src/test/java/com/dddheroes/heroesofddd/resourcespool/write/ResourcesPoolTest.java b/src/test/java/com/dddheroes/heroesofddd/resourcespool/write/ResourcesPoolTest.java
index cb69d97..32844a3 100644
--- a/src/test/java/com/dddheroes/heroesofddd/resourcespool/write/ResourcesPoolTest.java
+++ b/src/test/java/com/dddheroes/heroesofddd/resourcespool/write/ResourcesPoolTest.java
@@ -4,6 +4,7 @@
 import com.dddheroes.heroesofddd.resourcespool.write.withdraw.ResourcesWithdrawn;
 import com.dddheroes.heroesofddd.shared.Amount;
 import com.dddheroes.heroesofddd.shared.ResourceType;
+import com.dddheroes.heroesofddd.shared.Resources;
 import org.axonframework.test.aggregate.AggregateTestFixture;
 import org.junit.jupiter.api.*;
 
@@ -18,10 +19,10 @@ void setUp() {
     }
 
     protected ResourcesDeposited resourcesDeposited(ResourceType type, Integer amount) {
-        return ResourcesDeposited.event(resourcesPoolId, type, Amount.of(amount));
+        return ResourcesDeposited.event(resourcesPoolId, Resources.from(type, Amount.of(amount)));
     }
 
     protected ResourcesWithdrawn resourcesWithdrawn(ResourceType type, Integer amount) {
-        return ResourcesWithdrawn.event(resourcesPoolId, type, Amount.of(amount));
+        return ResourcesWithdrawn.event(resourcesPoolId, Resources.from(type, Amount.of(amount)));
     }
 }