(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.
You can use Aleister and the other invoked cards as splashable combos inside other decks. Giving a new dynamic to decks with multi attribute monsters and don’t use their Extra deck much (i.e. Fortune Lady, Monarch, Elementsaber)
The general strategy of this archetype is to search Invocation and then use Aleister the Invoker with one of your opponent’s graveyard monsters to make an Invoked monster. Invoked Caliga is a floodgate against monster effects and attacks, Invoked Cocytus is a wall with self protection, and Invoked Magellanica is a good beater.