Sun Titan, Umbral Collar Zealot, and Fungal Fortitude

Prerequisites

• Sun Titan on the battlefield
• Umbral Collar Zealot on the battlefield
• Fungal Fortitude on the battlefield

Steps

1. Activate Umbral Collar Zealot by sacrificing Sun Titan
2. When Sun Titan dies, Fungal Fortitude triggers, returning Sun Titan from your graveyard to the battlefield
3. When Sun Titan enters, it triggers, returning Fungal Fortitude 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