Prerequisites
- Garna, the Bloodflame in hand or in the command zone
 - Gray Merchant of Asphodel on the battlefield
 - Sneak Attack on the battlefield
 - Phyrexian Altar on the battlefield
 if Garna is in hand available
Steps
- If Garna is in the command zone, cast it by paying 
and commander tax, if applicable
 - Otherwise, activate Sneak Attack by paying 
, putting Garna from your hand onto the battlefield
 - Garna's enter the battlefield ability triggers
 - Holding priority, activate Phyrexian Altar by sacrificing Gray Merchant and Garna, adding 
 - Resolve the Garna ability, returning all creature cards put in your graveyard this turn to your hand
 - Activate Sneak Attack by paying 
, putting Gray Merchant from your hand onto the battlefield
 - Gray Merchant enters the battlefield, causing each opponent to lose life equal to your devotion to black, and causing you to gain life equal to the life lost this way
 - Activate Sneak Attack by paying 
, putting Garna from your hand onto the battlefield
 - Repeat from step 3
 
Results
- Infinite death triggers
 - Infinite ETB
 - Infinite lifegain
 - Infinite lifegain triggers
 - Infinite lifeloss
 - Infinite LTB
 - Infinite sacrifice triggers
 - Infinite storm count
 
Required Cards 4

Garna, the Bloodflame
Legendary Creature — Human Warrior

Gray Merchant of Asphodel
Creature — Zombie

Sneak Attack
Enchantment

Phyrexian Altar
Artifact