Extraction Specialist, Leonin Relic-Warder, Biotransference, and Ashnod's Altar

Prerequisites

• Extraction Specialist on the battlefield
• Leonin Relic-Warder in hand
• Biotransference on the battlefield
• Ashnod's Altar on the battlefield
• You have at least 2 life
• available

Steps

1. Cast Leonin Relic-Warder by paying
2. Biotransference triggers, causing you to lose 1 life and create a 2/2 Necron Warrior token
3. Leonin Relic-Warder's ETB ability triggers, exiling Extraction Specialist
4. Activate Ashnod's Altar by sacrificing Leonin Relic-Warder, adding
5. Leonin Relic-Warder's LTB ability triggers, returning Extraction Specialist from exile to the battlefield
6. Extraction Specialist enters the battlefield, returning Leonin Relic-Warder from your graveyard to the battlefield
7. Repeat from step 3

Results

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