How can you create a combo with Mikaeus, the Unhallowed, Retribution of the Ancients, Blood Vassal?
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[START OF COMBO]This combo can be formed with Mikaeus, the Unhallowed, Retribution of the Ancients, Blood Vassal

Color identity: B
Mana cost: 
Steps:
  1. Activate Blood Vassal by sacrificing it, adding {B}{B}.
  2. Blood Vassal dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  3. Activate Retribution of the Ancients by paying {B} and removing the +1/+1 counter from Blood Vassal, targeting any creature.
  4. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite black mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Reduce any number of target creatures' toughness to zero[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Blood Vassal does not have a +1/+1 counter on it.
[END OF COMBO PREREQUISITES]
assistant