Gravity Controller (MP21-EN020) [2021 Tin of Ancient Battles]

1 non-Link Monster in an Extra Monster Zone
<br>Cannot be used as Link Material the turn it is Link Summoned. This card in the Extra Monster Zone cannot be destroyed by battle with a monster in the Main Monster Zone. At the start of the Damage Step, if this card battles an opponent's monster in the Extra Monster Zone: You can return both that opponent's monster and this card to the Deck.