Cacophodon + Rite of Passage + Pyrohemia

Cacophodon

Rite of Passage

Pyrohemia

How it works

1. Activate the permanent by tapping it, adding .
2. Activate Pyrohemia by paying , dealing 1 damage to each creature and each player.
3. Cacophodon and Rite of Passage trigger.
4. Resolve the Rite of Passage trigger, putting a +1/+1 counter on each creature you control.
5. Resolve the Cacophodon trigger, untapping the permanent that can produce .
6. Repeat.