Mikaeus, the Unhallowed + Living Death + Ashnod's Altar + Blood Pet + Archaeomancer

Mikaeus, the Unhallowed
Living Death
Ashnod's Altar
Blood Pet
Archaeomancer

Requires
Mikaeus, the Unhallowed must be on the battlefield. Living Death must be in 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.
Steps
  1. Activate Blood Pet by sacrificing it, adding .
  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 .
  4. Activate Ashnod's Altar twice by sacrificing Archaeomancer and Mikaeus, adding .
  5. Cast Living Death by paying 3, causing each player to exile all creature cards in their graveyards, sacrifice all creatures they control, then put all cards exiled this way onto the battlefield.
  6. When Archaeomancer enters the battlefield, it triggers, returning Living Death to your hand from your graveyard.
  7. Repeat.
Results
Infinite colorless mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite magecraft triggers. Infinite sacrifice triggers. Infinite storm count.