Karmic Guide, Reveillark, and Ashnod's Altar

Prerequisites

• Karmic Guide on the battlefield
• Reveillark on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Karmic Guide, adding
2. Activate Ashnod's Altar by sacrificing Reveillark, adding
3. Reveillark dies, returning Karmic Guide from your graveyard to the battlefield
4. Karmic Guide enters the battlefield, returning Reveillark from your graveyard to the battlefield
5. Repeat

Results

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