Add script for Damping Field

release/Magarena/scripts/Damping_Field.groovy

@@ -0,0 +1,21 @@
+[
+    new MagicAtUpkeepTrigger() {
+        @Override
+        public MagicEvent executeTrigger(final MagicGame game, final MagicPermanent permanent, final MagicPlayer upkeepPlayer) {
+            return new MagicEvent(
+                permanent,
+                upkeepPlayer,
+                MagicTargetChoice.ARTIFACT_YOU_CONTROL,
+                MagicTapTargetPicker.Untap,
+                this,
+                "PN untaps an artifact PN controls\$."
+            );
+        }
+        @Override
+        public void executeEvent(final MagicGame game,final MagicEvent event) {
+            event.processTargetPermanent(game, {
+                game.doAction(new MagicUntapAction(it));
+            });
+        }
+    }
+]

release/Magarena/scripts/Damping_Field.txt

@@ -0,0 +1,10 @@
+name=Damping Field
+image=http://mtgimage.com/card/damping%20field.jpg
+value=2.500
+rarity=U
+type=Enchantment
+cost={2}{W}
+ability=artifacts have "SN doesn't untap during your untap step."
+timing=enchantment
+requires_groovy_code
+oracle=Players can't untap more than one artifact during their untap steps.