Activated Sleeper, Karmic Guide, and Ashnod's Altar

Prerequisites

• Activated Sleeper in hand
• Karmic Guide on the battlefield
• Ashnod's Altar on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Karmic Guide, adding
2. Cast Activated Sleeper by paying , choosing to have it enter the battlefield as a copy of Karmic Guide
3. Activated Sleeper enters the battlefield, targeting Karmic Guide
4. Holding priority, activate Ashnod's Altar by sacrificing Activated Sleeper, adding
5. Resolve the Activated Sleeper trigger, returning Karmic Guide from your graveyard to the battlefield
6. Karmic Guide enters the battlefield, targeting Activated Sleeper
7. Holding priority, activate Ashnod's Altar by sacrificing Karmic Guide, adding
8. Resolve the Karmic Guide trigger, returning Activated Sleeper from your graveyard to the battlefield as a copy of Karmic Guide
9. Repeat from step 3

Results

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