(Color indicator: Grist, the Plague Swarm is black and green)
[+1]: Create a 1/1 black and green Insect creature token, then mill two cards. Put a deathtouch counter on the token if a black card was milled this way.
[–2]: Destroy target artifact or enchantment.
[–6]: For each creature card in your graveyard, create a token that's a copy of it, except it's a 1/1 black and green Insect.