Sun Titan, Gift of Immortality, and Ashnod's Altar

Prerequisites

• Sun Titan on the battlefield
• Gift of Immortality on the battlefield
• Ashnod's Altar on the battlefield

Steps

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

Results

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