You control at least one creature token that entered the battlefield this turn.
Grimgrin is untapped and does not have summoning sickness.
Mana Needed
available.
Steps
Activate Atla by paying and tapping it, creating an 0/1 Egg creature token with defender.
Activate a nontoken creature you control using the ability granted to it by
Ghired by tapping it, creating a copy of the Egg token.
Activate
Grimgrin by sacrificing an Egg token.
When the Egg dies, Atla triggers, causing you to reveal cards from the top of your library until you reveal a creature card and put it onto the battlefield.
Resolve the
Grimgrin ability, putting a +1/+1 counter on
Grimgrin and untapping it.
Repeat from step 2.
Activate
Grimgrin by tapping it, creating a token copy of any creature token you control that entered the battlefield this turn.
Activate
Grimgrin by sacrificing the creature token created in step 1, untapping
Grimgrin and putting a +1/+1 counter on it.
Repeat.
Results
Infinite +1/+1 counters on a creature.
Infinite creature ETB.
Infinite creature LTB.
Infinite creature sacrifice triggers.
Infinite death triggers.
Near-infinite +1/+1 counters on a creature.
Near-infinite creature ETB.
Near-infinite creature LTB.
Near-infinite creature sacrifice triggers.
Near-infinite death triggers.
Put all creature cards from your library onto the battlefield tapped.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
1
2
3
4
5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.