Feldon of the Third Path, Diamond Lion, Thornbite Staff, and Hissing Iguanar

Prerequisites

• Feldon of the Third Path on the battlefield
• Diamond Lion in the graveyard
• Thornbite Staff on the battlefield
• Hissing Iguanar on the battlefield
• Feldon of the Third Path does not have summoning sickness
• Thornbite Staff attached to Feldon of the Third Path
• available

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

• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers