Warren Soultrader, Gravecrawler, and Nadier's Nightblade

Prerequisites

• Warren Soultrader on the battlefield
• Gravecrawler on the battlefield
• Nadier's Nightblade on the battlefield

Steps

1. Activate Warren Soultrader by paying 1 life and sacrificing Gravecrawler, creating a Treasure token
2. Activate the Treasure by tapping and sacrificing it, adding
3. Nadier Nightblade triggers, causing each opponent to lose 1 life and you to gain 1 life
4. Cast Gravecrawler from your graveyard by paying
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite storm count
• Infinite lifeloss