Scaretiller + Voltaic Construct + Crystal Vein + Amulet of Vigor + Viridian Longbow

Scaretiller

Voltaic Construct

Crystal Vein

Amulet of Vigor

Viridian Longbow

How it works

1. Activate Crystal Vein's second ability by tapping and sacrificing it, adding CC.
2. Activate Scaretiller by tapping it.
3. Scaretiller triggers, returning Crystal Vein from your graveyard to the battlefield tapped.
4. Crystal Vein enters the battlefield tapped, triggering Amulet of Vigor, untapping Crystal Vein.
5. Resolve the Scaretiller ability from step 2, dealing 1 damage to any target.
6. Activate Voltaic Construct by paying 2, untapping Scaretiller.
7. Repeat.