Chainer, Dementia Master + Gray Merchant of Asphodel + K'rrik, Son of Yawgmoth + Shilgengar, Sire of Famine

WB identity

Commander legal

The 4 combo pieces

• Chainer, Dementia Master
• Gray Merchant of Asphodel
• K'rrik, Son of Yawgmoth
• Shilgengar, Sire of Famine

How to execute it

1. Activate Shilgengar by sacrificing Gray Merchant.
2. Activate Chainer by paying 9 life due to K'rrik, returning Gray Merchant from your graveyard to the battlefield as a Nightmare in addition to its other creature types.
3. When Gray Merchant enters, it triggers, causing each opponent to lose life equal to your devotion to black and causing you to gain that much life.
4. Repeat.

What the combo produces

• Infinite Blood tokens
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite sacrifice triggers
• Return all creature cards from all graveyards to the battlefield under your control