How can you create a combo with Mikaeus, the Unhallowed, Soulstinger, Bloodflow Connoisseur?
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[START OF COMBO]This combo can be formed with Mikaeus, the Unhallowed, Soulstinger, Bloodflow Connoisseur

Color identity: B
Mana cost: 
Steps:
  1. Activate Bloodflow Connoisseur by sacrificing Soulstinger.
  2. When Soulstinger dies, its second and undying abilities trigger.
  3. Resolve the first trigger, allowing you to put a number of -1/-1 counters on a creature equal to the number that were on Soulstinger.
  4. Resolve the undying trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  5. When Soulstinger enters the battlefield, its first ability triggers, putting two -1/-1 counters on it.
  6. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite -1/-1 counters
  - Infinite +1/+1 counters on Bloodflow Connoisseur
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

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