Scaretiller + Cacophodon + Viridian Longbow + Roaring Earth + Cabaretti Courtyard

Scaretiller

Cacophodon

Viridian Longbow

Roaring Earth

Cabaretti Courtyard

How it works

1. Activate Scaretiller by tapping it, targeting Cacophodon.
2. Scaretiller triggers, returning Cabaretti Courtyard from your graveyard to the battlefield tapped.
3. Cabaretti Courtyard enters the battlefield, triggering itself and Roaring Earth.
4. Resolve the Roaring Earth trigger, putting a +1/+1 counter on Cacophodon.
5. Resolve the Cabaretti Courtyard trigger, causing you to sacrifice it and search your library for a basic Plains, Mountain or Forest and put it onto the battlefield tapped.
6. If you put a land onto the battlefield this way, Roaring Earth triggers, putting a +1/+1 counter on a creature you control.
7. Resolve the Scaretiller ability from step 1, dealing 1 damage to Cacophodon.
8. Cacophodon triggers, untapping Scaretiller.
9. Repeat.