How can you create a combo with Mikaeus, the Unhallowed, Rise of the Dark Realms, Ashnod's Altar, Blood Pet, Archaeomancer?
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[START OF COMBO]This combo can be formed with Mikaeus, the Unhallowed, Rise of the Dark Realms, Ashnod's Altar, Blood Pet, Archaeomancer

Color identity: UB
Mana cost: 
Steps:
  1. Activate Blood Pet by sacrificing it, adding {B}.
  2. When Blood Pet dies, its undying ability triggers, returning it to the battlefield from your graveyard with a +1/+1 counter on it.
  3. Activate Blood Pet by sacrificing it, adding {B}.
  4. Activate Ashnod's Altar twice by sacrificing Archaeomancer and another nontoken non-Human creature, adding {C}{C}{C}{C}.
  5. When the non-Human creature dies, its undying ability triggers, returning it to the battlefield from your graveyard with a +1/+1 counter on it.
  6. Activate Ashnod's Altar twice by sacrificing Mikaeus and the non-Human creature, adding {C}{C}{C}{C}.
  7. Cast Rise of the Dark Realms by paying {7}{B}{B}, putting all creature cards from all graveyards onto the battlefield under your control.
  8. When Archaeomancer enters the battlefield, it triggers, returning Living Death to your hand from your graveyard.
  9. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Mikaeus, the Unhallowed must be on the battlefield
  - Rise of the Dark Realms must be in your hand
  - Ashnod's Altar must be on the battlefield
  - Blood Pet must be on the battlefield
  - Archaeomancer must be on the battlefield
  - Blood Pet does not have a +1/+1 counter on it.
  - You control another nontoken non-Human creature that does not have a +1/+1 counter on it.
[END OF COMBO PREREQUISITES]
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