Ozox, the Clattering King + Phyrexian Altar + Abzan Ascendancy

Ozox, the Clattering King

Phyrexian Altar

Abzan Ascendancy

How it works

1. Activate Phyrexian Altar by sacrificing Ozox, adding 1.
2. When Ozox dies, it and Abzan Ascendancy trigger.
3. Resolve the Ozox trigger, creating a legendary 2/1 Jumblebones creature token.
4. Resolve the Abzan Ascendancy 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 ingenious loop uses the recursive cycle between Ozox, the Clattering King and its skeletal token to generate a staggering array of triggers, all while Phyrexian Altar converts your expendable fodder into the exact black mana needed to recast the king. Meanwhile, Abzan Ascendancy acts as a brilliant catalyst, leveraging every sacrifice of a nontoken creature to spawn an extra white Spirit token that feeds right back into the altar for profit. By continually looping Ozox and Jumblebones back and forth between the battlefield, graveyard, and hand, you achieve an engine of endless sacrifices and enters-the-battlefield effects.