How can you create a combo with Nim Deathmantle, Su-Chi Cave Guard, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Nim Deathmantle, Su-Chi Cave Guard, Altar of Dementia

Color identity: C
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing Su-Chi Cave Guard.
  2. When Su-Chi Cave Guard dies, it and Nim Deathmantle triggers.
  3. Resolve the Su-Chi Cave Guard trigger, adding eight {C}.
  4. Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return Su-Chi Cave Guard from your graveyard to the battlefield, and attach Nim Deathmantle to it.
  5. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Su-Chi Cave Guard's power.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant