You get to retrigger creatures with better enters abilities, like Solemn Simulacrum or Luminate Primordial, and a Panharmonicon or other trigger doubler really gets out of control
I'd bargain every EDH player has heard of Craterhoof Behemoth, but just in case you're unfamiliar, this eight mana creature is one of green's best finishers
Everything Else Knight-Errant of Eos For a deck that can put a lot of bodies on the field, Knight-Errant of Eos can be a pretty good way of digging for more creatures
Okay, and green has an exception I'll get to below.) Remove all counters Whether it's removing loyalty counters from a Planeswalker or +1/+1 counters from a 0/0 creature, black can use this ability to kill things
Here's one: randomly pick a card in a new set and see if you can understand why that card was put into the set
This huge Demon provides you with all sorts of ways to combo off