Soldevi Adnate + Nim Deathmantle + Village Bell-Ringer
Soldevi Adnate
Nim Deathmantle
Village Bell-Ringer
Infinite creature LTBInfinite creature ETBInfinite creature sacrifice triggersInfinite death triggersInfinite untap of creatures you controlInfinite mana creatures you control can produceInfinite black mana
How it works
Activate any number of other creatures you control by tapping them, adding at least 1.
Activate Soldevi Adnate by tapping it and sacrificing Village Bell-Ringer, adding an amount of equal to Village Bell-Ringer's mana value.
When Village Bell-Ringer dies, Nim Deathmantle triggers, causing you to pay 4 to return Village Bell-Ringer from your graveyard to the battlefield, and attach Nim Deathmantle to it.
When Village Bell-Ringer enters the battlefield, it triggers, untapping all creatures you control.
Repeat.
This ingenious loop hinges on Village Bell-Ringer's enter-the-battlefield trigger to constantly refresh your board state while paying the mana required to keep the engine running. When you sacrifice Village Bell-Ringer to Soldevi Adnate, you generate the black mana needed to fund Nim Deathmantle's resurrection trigger, which brings the Bell-Ringer right back to the battlefield. That arrival untaps Soldevi Adnate and any other creatures you control, allowing you to filter that mana, reap infinite sacrifices, and flood your pool with infinite black mana.