Totem Armor mechanic

Mage/src/mage/abilities/keyword/TotemArmorAbility.java

@@ -0,0 +1,74 @@
+package mage.abilities.keyword;
+
+import mage.Constants;
+import mage.abilities.Ability;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.effects.ReplacementEffectImpl;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+
+public class TotemArmorAbility extends SimpleStaticAbility {
+    public TotemArmorAbility() {
+        super(Constants.Zone.BATTLEFIELD, new TotemArmorEffect());
+    }
+
+    public TotemArmorAbility(final TotemArmorAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public SimpleStaticAbility copy() {
+        return new TotemArmorAbility(this);
+    }
+
+    @Override
+    public String getRule() {
+        return "Totem Armor";
+    }
+}
+
+class TotemArmorEffect extends ReplacementEffectImpl<TotemArmorEffect> {
+    TotemArmorEffect() {
+        super(Constants.Duration.WhileOnBattlefield, Constants.Outcome.Benefit);
+    }
+
+    TotemArmorEffect(final TotemArmorEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
+        Permanent sourcePermanent = game.getPermanent(source.getSourceId());
+        if (sourcePermanent != null) {
+            Permanent equipedPermanent = game.getPermanent(event.getTargetId());
+            if (equipedPermanent != null) {
+                equipedPermanent.removeAllDamage(game);
+                sourcePermanent.destroy(source.getSourceId(), game, false);
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        if (event.getType() == GameEvent.EventType.DESTROY_PERMANENT) {
+            Permanent sourcePermanent = game.getPermanent(source.getSourceId());
+            if (sourcePermanent != null && event.getTargetId().equals(sourcePermanent.getAttachedTo())) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return true;
+    }
+
+    @Override
+    public TotemArmorEffect copy() {
+        return new TotemArmorEffect(this);
+    }
+}