Ozox, the Clattering King + Phyrexian Altar + Bridge from Below

Ozox, the Clattering King

Phyrexian Altar

Bridge from Below

How it works

1. Activate Phyrexian Altar by sacrificing Ozox, adding 1.
2. When Ozox dies, it and Bridge from Below trigger.
3. Resolve the Ozox trigger, creating a legendary 2/1 Jumblebones creature token.
4. Resolve the Bridge from Below trigger, creating a creature token.
5. Activate Phyrexian Altar twice by sacrificing Jumblebones and the other creature token, adding 1.
6. When Jumblebones dies, it triggers, returning Ozox from your graveyard to your hand.
7. Cast Ozox by paying 2.
8. Repeat.

This clever loop transforms a resilient skeleton into a continuous engine of life and bone, leveraging Ozox, the Clattering King as the primary sacrifice fodder whose own demise naturally births the skeletal Jumblebones token to carry on the work. As Jumblebones hits the graveyard and leaves the battlefield, its trigger dutifully returns Ozox right back to your hand, while Phyrexian Altar readily converts every single sacrifice into the exact black mana needed to recast the king. Meanwhile, Bridge from Below waits silently in the graveyard, effortlessly capitalizing on every nontoken creature sent there to generate an extra Zombie token that fuels the altar's mana production and keeps the cycle indefinitely spinning.