Swift Warkite, Activated Sleeper, and Ashnod's Altar

Prerequisites

• Swift Warkite on the battlefield
• Activated Sleeper in hand
• Ashnod's Altar on the battlefield
• available

Steps

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

Results

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