mtg mimic card Vat | Scars of Mirrodin Foil | Modern Each other creature you control of the chosen type enters the battlefield with an additional +1/+1 counter on it. Progenitor Mimic · Dragon's Maze

Strictly speaking, he might be better as part of a Green-Black build as part of the deck itself, but well go down the Fynn rabbit hole anyway

Its a shame it goes to exile once you do, but if it didnt

The common landcyclers feel like they will be extra good in the graveyard decks in the format, and Blue is definitely interested in the graveyard

That said, I think this will speed the deck up with very little downside to running the card

The top commanders for Waves of Aggression tend towards wide board states and attack triggers

The Guardian of Faith is a particularly great card that allows you to phase out as many creatures as you like for one turn as they enter the battlefield