Adarkar Valkyrie, Thornbite Staff, and Viscera Seer

Prerequisites

• Adarkar Valkyrie on the battlefield
• Thornbite Staff on the battlefield
• Viscera Seer on the battlefield
• Adarkar Valkyrie does not have summoning sickness

Steps

1. Activate Adarkar Valkyrie by tapping it, targeting Viscera Seer
2. Activate Viscera Seer by sacrificing it
3. When Viscera Seer dies, Adarkar Valkyrie triggers twice
4. Resolve the first trigger, untapping Adarkar Valkyrie
5. Resolve the second trigger, returning Viscera Seer from your graveyard to the battlefield
6. Resolve the Viscera Seer ability, causing you to scry 1
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite scry 1