[DSK] Implement Chainsaw

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

@@ -0,0 +1,53 @@
+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.events.ZoneChangeBatchEvent;
+import mage.game.events.ZoneChangeEvent;
+import mage.game.permanent.Permanent;
+
+/**
+ * @author Cguy7777
+ */
+public class DiesOneOrMoreCreaturesTriggeredAbility extends TriggeredAbilityImpl {
+
+    public DiesOneOrMoreCreaturesTriggeredAbility(Effect effect) {
+        this(effect, false);
+    }
+
+    public DiesOneOrMoreCreaturesTriggeredAbility(Effect effect, boolean optional) {
+        super(Zone.BATTLEFIELD, effect, optional);
+        setTriggerPhrase("Whenever one or more creatures die, ");
+    }
+
+    private DiesOneOrMoreCreaturesTriggeredAbility(final DiesOneOrMoreCreaturesTriggeredAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public DiesOneOrMoreCreaturesTriggeredAbility copy() {
+        return new DiesOneOrMoreCreaturesTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.ZONE_CHANGE_BATCH;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        for (ZoneChangeEvent zEvent : ((ZoneChangeBatchEvent) event).getEvents()) {
+            if (!zEvent.isDiesEvent()) {
+                continue;
+            }
+            Permanent permanent = game.getPermanentOrLKIBattlefield(zEvent.getTargetId());
+            if (permanent != null && permanent.isCreature(game)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

Mage/src/main/java/mage/counters/CounterType.java

@@ -180,6 +180,7 @@ public enum CounterType {
     REJECTION("rejection"),
     REPAIR("repair"),
     REPRIEVE("reprieve"),
+    REV("rev"),
     RIBBON("ribbon"),
     RITUAL("ritual"),
     ROPE("rope"),