After Aleister is used for a Fusion, it can bring itself back to the hand easily and recycle Invocation to repeat the process all over again the next turn
Im going to predicate what I say here on the assumption that this is legitimate
As someone who mainly plays retro formats, maybe I just completely overestimated how consistent the game has gotten when I imagined players casually shrugging off this three Energy attack, which, granted, you definitely have many ways of satisfying the cost for
Extinguisher Battleship Extinguisher Battleship is a fascinating colorless board wipe that handles most creatures, and it destroys another problematic permanent like a planeswalker
Even if you're mixing in a few instant-speed token generators, the chance to turn three draws into 7 cards in your hand is pretty good
Rolling, on the other hand, doesnt get the support I would have liked to see