Mikaeus, the Unhallowed, Warren Soultrader, and Kheru Bloodsucker

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Warren Soultrader on the battlefield
• Kheru Bloodsucker on the battlefield

Steps

1. Activate Warren Soultrader by paying 1 life and sacrificing the persist creature
2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When it enters, Kheru Bloodsucker triggers, causing each opponent to lose life and you to gain life
4. Resolve the Warren Soultrader ability, creating a Treasure token
5. Activate Warren Soultrader by paying 1 life and sacrificing the persist creature
6. When the persist creature dies, its undying ability from Mikaeus triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
7. When it enters, Kheru Bloodsucker triggers, causing each opponent to lose life and you to gain life
8. Resolve the Warren Soultrader ability, creating a Treasure token
9. Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite Treasure tokens
• Infinite colored mana
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite creature sacrifice triggers
• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite artifact tokens
• Infinite lifegain