Ashiok, Nightmare Weaver can do three at a time, Ulamog, the Ceaseless Hunger can exile 20 cards at once and Ulamog, the Defiler exiles the top half of an opponent's library
Whenever a player attacks with five or more creatures, Aurelia deals 3 damage to each of your opponents and you gain 3 life
This can create infinite card draw and near-infinite lifegain
Similar to Ace, 9-cost Luffy has the Rush keyword, letting you attack with him on the turn hes played, either to KO a rested Character or damage the opponents Leader
This little Instant also offers a way to edge in a win if your opponent has just enough Creatures to block
Bontu's Last Reckoning also would probably do better in the sideboard against highly aggressive go-wide strategies - the card just feels like it would hurt you more than the opponent in a lot of other matchups (don't want to make the combo matchups even worse than they already are right?)