How can you create a combo with Chainer, Dementia Master, K'rrik, Son of Yawgmoth, Gray Merchant of Asphodel, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Chainer, Dementia Master, K'rrik, Son of Yawgmoth, Gray Merchant of Asphodel, Ashnod's Altar

Color identity: B
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Gray Merchant, adding {C}{C}.
  2. Activate Chainer by paying nine life, returning Gray Merchant from your graveyard to the battlefield as a Nightmare in addition to its other creature types.
  3. 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 amount of life lost this way.
  4. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite lifeloss
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Put all creature cards from all graveyards onto the battlefield under your control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Your life total is at least ten.
  - Your devotion to black is at least ten or you have at least two opponents.
[END OF COMBO PREREQUISITES]
assistant