Ulamog's Dreadsire, Thornbite Staff, and Umbral Collar Zealot

Prerequisites

• Ulamog's Dreadsire on the battlefield
• Thornbite Staff on the battlefield
• Umbral Collar Zealot on the battlefield

Steps

1. Activate Ulamog's Dreadsire by tapping it, creating a 10/10 Eldrazi creature tokens
2. Activate Umbral Collar Zealot by sacrificing the Eldrazi token
3. When the Eldrazi token dies, Ulamog's Dreadsire triggers, untapping Ulamog's Dreadsire
4. Resolve the Umbral Collar Zealot ability Repeat

Results

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