Requires

Feldon of the Third Path must be on the battlefield. Diamond Lion must be in the graveyard. Thornbite Staff must be on the battlefield. Hissing Iguanar must be on the battlefield. Feldon of the Third Path does not have summoning sickness. Thornbite Staff attached to Feldon of the Third Path. Mana needed:

Steps

1. Activate Feldon of the Third Path by paying and tapping it, creating a token copy of Diamond Lion with haste.
2. Activate Diamond Lion by tapping it, discarding your hand, and sacrificing it, adding .
3. Thornbite Staff and Stalking Vengeance both trigger.
4. Resolve the Vicious Shadows trigger, dealing 1 damage to target player or planeswalker.
5. Resolve the Thornbite Staff trigger, untapping Feldon of the Third Path.
6. Repeat.

Results