Warren Soultrader, Gravecrawler, and Carmen, Cruel Skymarcher

Prerequisites

• Warren Soultrader on the battlefield
• Gravecrawler on the battlefield
• Carmen, Cruel Skymarcher on the battlefield
• Your life total is at least 2

Steps

1. Activate Warren Soultrader by paying 1 life and sacrificing Gravecrawler
2. When Gravecrawler dies, Carmen triggers, causing you to gain 1 life and put a +1/+1 counter on Carmen
3. Resolve the Warren Soultrader ability, creating a Treasure token
4. Activate the Treasure by tapping and sacrificing it, adding
5. Cast Gravecrawler from your graveyard by paying
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite storm count
• Infinite +1/+1 counters on Carmen