add Accelerated Mutation

release/Magarena/scripts/Accelerated_Mutation.groovy

@@ -0,0 +1,27 @@
+[
+    new MagicSpellCardEvent() {
+        @Override
+        public MagicEvent getEvent(final MagicCardOnStack cardOnStack,final MagicPayedCost payedCost) {
+            return new MagicEvent(
+                cardOnStack,
+                POS_TARGET_CREATURE,
+                MagicPumpTargetPicker.create(),
+                this,
+                "Target creature\$ gets +X/+X until end of turn, where X is the highest converted mana cost "+
+                "among permanents PN controls."
+            );
+        }
+        @Override
+        public void executeEvent(final MagicGame game, final MagicEvent event) {
+            final MagicPlayer player = event.getPlayer();
+            int X = 0;
+            PERMANENT_YOU_CONTROL.filter(player) each {
+                X = Math.max(X, it.getConvertedCost());
+            }
+            game.logAppendValue(player, X);
+            event.processTargetPermanent(game, {
+                game.doAction(new ChangeTurnPTAction(it, X, X));
+            });
+        }
+    }
+]

release/Magarena/scripts/Accelerated_Mutation.txt

@@ -4,7 +4,6 @@ value=2.641
 rarity=C
 type=Instant
 cost={3}{G}{G}
-effect=Target creature gets +X/+X until end of turn, where X is the highest converted mana cost among permanents you control.
-timing=removal
+timing=pump
 oracle=Target creature gets +X/+X until end of turn, where X is the highest converted mana cost among permanents you control.
-status=needs groovy
+requires_groovy_code