Fixed that abilities of copied permanents (e.g. Phyrexian Metamorph copying Harmonic Sliver) that gain abilities to other permanents were in some situations not correctly applied to that other permanents.

Mage/src/mage/abilities/effects/common/continuous/GainAbilitySourceEffect.java

@@ -80,6 +80,7 @@ public class GainAbilitySourceEffect extends ContinuousEffectImpl implements Sou
     public GainAbilitySourceEffect(final GainAbilitySourceEffect effect) {
         super(effect);
         this.ability = effect.ability.copy();
+        ability.newId(); // This is needed if the effect is copied e.g. by a clone so the ability can be added multiple times to permanents
         this.onCard = effect.onCard;
     }