How can you create a combo with Mikaeus, the Unhallowed, Deathbringer Thoctar, Altar of Dementia?
user
[START OF COMBO]This combo can be formed with Mikaeus, the Unhallowed, Deathbringer Thoctar, Altar of Dementia

Color identity: BR
Mana cost: 
Steps:
  1. Activate Deathbringer Thoctar by removing a +1/+1 counter from it, dealing 1 damage to any target.
  2. Repeat step 1 until Deathbringer Thoctar has no +1/+1 counters on it.
  3. Activate Altar of Dementia by sacrificing Deathbringer Thoctar.
  4. Deathbringer Thoctar dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  5. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Deathbringer Thoctar's power.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite damage
  - 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