Sun Titan, Shilgengar, Sire of Famine, and Necrogen Communion

Prerequisites

• Sun Titan on the battlefield
• Shilgengar, Sire of Famine on the battlefield
• Necrogen Communion on the battlefield

Steps

1. Activate Shilgengar by sacrificing Sun Titan
2. When Sun Titan dies, Necrogen Communion triggers, returning Sun Titan from your graveyard to the battlefield
3. When Sun Titan enters, it triggers, returning Necrogen Communion from your graveyard to the battlefield attached to Sun Titan
4. Resolve the Shilgengar ability
5. Repeat

Results

• Infinite Blood tokens
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers