Sun Titan, Umbral Collar Zealot, and Unholy Indenture

Prerequisites

• Sun Titan on the battlefield
• Umbral Collar Zealot on the battlefield
• Unholy Indenture on the battlefield

Steps

1. Activate Umbral Collar Zealot by sacrificing Sun Titan
2. When Sun Titan dies, Unholy Indenture triggers, returning Sun Titan from your graveyard to the battlefield
3. When Sun Titan enters, it triggers, returning Unholy Indenture from your graveyard to the battlefield attached to Sun Titan
4. Resolve the Umbral Collar Zealot ability
5. Repeat

Results

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