2+ "Altergeist" monsters
During the Battle Phase (Quick Effect): You can Tribute 1 other monster; this card gains ATK equal to that Tributed monster's ATK on the field. When this card destroys a monster by battle: You can destroy 1 monster your opponent controls, and if you do, this card can make a second attack in a row. If this card would be destroyed, you can banish 1 monster from your GY instead. You can only use each effect of "Altergeist Memorygant" once per turn.