Sun Titan, Ashnod's Altar, and Shade's Form

Prerequisites

• Sun Titan on the battlefield
• Ashnod's Altar on the battlefield
• Shade's Form on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Sun Titan
2. When Sun Titan dies, Shade's Form triggers, returning Sun Titan from your graveyard to the battlefield
3. When Sun Titan enters, it triggers, returning Shade's Form from your graveyard to the battlefield attached to Sun Titan
4. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers