Dragonlord Dromoka Dragonlord Dromoka is a calm, unshakeable commander that rewards you for playing fair, big Magic
Coram gets larger as bigger creatures wind up in everyone's graveyards, he mills decks for more recursion targets, and he provides access to a milled spell or land every turn--all things that synergize well with Graveyard Overdrive's plans
Ideally, it would be a creature some sort of evasion or effect based on its power, like Threefold Thunderhulk, who floods the field with tons of Gnomes the instant it attacks
Its just Yawgmoth's Will on a stick, a card already famous for being one of the best storm enablers in the game
Youre not attacking with your saprolings unless you have to, though youll still get the death triggers either way
Certainly, a 5/5 trampler for with a notable triggered ability is nice, but sometimes that drawback can be a boon, such as if you also have an Orchard Warden on the battlefield and you get to gain life when Unstoppable Ash enters the battlefield as well as gain life when it leaves the battlefield since the Treefolk you exiled will return to play