Cryptic Trilobite + Together Forever + Grumgully, the Generous

Cryptic Trilobite

Together Forever

Grumgully, the Generous

How it works

1. Cast Cryptic Trilobite by paying 0, causing it to enter the battlefield with a +1/+1 counter on it due to Grumgully.
2. Activate Together Forever by paying 1, targeting Cryptic Trilobite.
3. Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding CC that can only be spent to activate abilities.
4. Cryptic Trilobite dies as a state-based action due to having 0 toughness, triggering Together Forever, returning Cryptic Trilobite from your graveyard to your hand.
5. Repeat.