Aleister the Invoker (SHVA-EN040)

(Quick Effect): You can send this card from your hand to the GY, then target 1 Fusion Monster you control; it gains 1000 ATK/DEF until the end of this turn. If this card is Normal Summoned or flipped face-up: You can add 1 "Invocation" from your Deck to your hand.

Spellcaster / Effect, Shadows in Valhalla