-don't static import static filters

-use existing choose color and gain protection from color attached effects
-update naming and add null check for AttachedToCreatureSourceTriggeredAbility

Mage/src/main/java/mage/abilities/common/AttachedToCreatureSourceTriggeredAbility.java

@@ -0,0 +1,48 @@
+package mage.abilities.common;
+
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.effects.Effect;
+import mage.constants.Zone;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+
+import static mage.constants.CardType.CREATURE;
+
+/**
+ *
+ * @author htrajan
+ */
+public class AttachedToCreatureSourceTriggeredAbility extends TriggeredAbilityImpl {
+
+    public AttachedToCreatureSourceTriggeredAbility(Effect effect, boolean optional) {
+        super(Zone.BATTLEFIELD, effect, optional);
+    }
+
+    public AttachedToCreatureSourceTriggeredAbility(final AttachedToCreatureSourceTriggeredAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.ATTACHED
+                && event.getSourceId() != null
+                && event.getSourceId().equals(this.getSourceId());
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        Permanent attachedPermanent = game.getPermanent(event.getTargetId());
+        return attachedPermanent != null && attachedPermanent.getCardType().contains(CREATURE);
+    }
+
+    @Override
+    public String getRule() {
+        return "As {this} becomes attached to a creature, " + super.getRule();
+    }
+
+    @Override
+    public AttachedToCreatureSourceTriggeredAbility copy() {
+        return new AttachedToCreatureSourceTriggeredAbility(this);
+    }
+}