Soldevi Adnate + Nim Deathmantle + Sky Hussar

Soldevi Adnate

Nim Deathmantle

Sky Hussar

How it works

1. Activate Soldevi Adnate by tapping it and sacrificing Sky Hussar, adding an amount of equal to Sky Hussar's mana value.
2. When Sky Hussar dies, Nim Deathmantle triggers, causing you to pay 4 to return Sky Hussar from your graveyard to the battlefield, and attach Nim Deathmantle to it.
3. When Sky Hussar enters the battlefield, it triggers, untapping all creatures you control.
4. Repeat.

This clever loop transforms high mana value into an unstoppable engine by leveraging Soldevi Adnate to sacrifice Sky Hussar for a hefty black mana injection. As the Hussar hits the graveyard, Nim Deathmantle's triggered ability steps in, allowing you to pay four mana to return the creature to the battlefield and reattach the Equipment. Finally, Sky Hussar's entrance triggers to untap all your creatures, leaving Soldevi Adnate refreshed and ready to sacrifice the Hussar all over again for infinite black mana, death triggers, and untap steps.