Sun Titan, Phyrexian Altar, and Shade's Form

Prerequisites

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

Steps

1. Activate Phyrexian 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 creature LTB
• Infinite creature sacrifice triggers
• Infinite colored mana
• Infinite death triggers
• Infinite creature ETB