Dimension Mirage (MVP1-EN025) - The Dark Side of Dimensions Movie Pack Unlimited

Activate this card by targeting 1 face-up Attack Position monster your opponent controls. At the end of the Damage Step, when it attacks a monster, but the attack target was not destroyed by the battle: You can banish 1 monster from your Graveyard; it must attack again in a row. If the targeted monster leaves the field, destroy this card.