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Mage/src/main/java/mage/abilities/dynamicvalue/AdditiveDynamicValue.java

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+package mage.abilities.dynamicvalue;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.Effect;
+import mage.game.Game;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class AdditiveDynamicValue implements DynamicValue {
+
+    private List<DynamicValue> dynamicValues;
+
+    /**
+     * Creates a {@link DynamicValue} from that adds together multiple {@link DynamicValue}s.
+     * @param dynamicValues The dynamic values to add together.
+     */
+    public AdditiveDynamicValue(DynamicValue...dynamicValues){
+        this.dynamicValues = Arrays.asList(dynamicValues);
+    }
+
+    /**
+     * Creates a {@link DynamicValue} from that adds together multiple {@link DynamicValue}s.
+     * @param dynamicValues The dynamic values to add together.
+     */
+    public AdditiveDynamicValue(List<DynamicValue> dynamicValues){
+        this.dynamicValues = dynamicValues;
+    }
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        return dynamicValues.stream().mapToInt(d->d.calculate(game, sourceAbility, effect)).sum();
+    }
+
+    @Override
+    public DynamicValue copy() {
+        return new AdditiveDynamicValue(this.dynamicValues);
+    }
+
+    @Override
+    public String getMessage() {
+        return this.dynamicValues.stream().map(DynamicValue::getMessage).collect(Collectors.joining(" "));
+    }
+}