diff --git a/incomplete/Rock_Hydra.groovy b/incomplete/Rock_Hydra.groovy
new file mode 100644
index 0000000000..bd1fd42534
--- /dev/null
+++ b/incomplete/Rock_Hydra.groovy
@@ -0,0 +1,16 @@
+[   
+    new MagicPreventDamageTrigger() {
+        @Override
+        public MagicEvent executeTrigger(final MagicGame game, final MagicPermanent permanent, final MagicDamage damage) {
+            if (damage.getTarget() == permanent && permanent.hasCounters(MagicCounterType.PlusOne)) {
+                final int amount = permanent.getCounters(MagicCounterType.PlusOne);
+                // Prevention effect.
+                damage.prevent(amount);
+            
+                game.doAction(new ChangeCountersAction(permanent,MagicCounterType.PlusOne,-amount));
+            }
+            return MagicEvent.NONE;
+        }
+    }
+]
+//Rock Hydra's activated damage prevention should occur before this