Prerequisites
- Ozox, the Clattering King on the battlefield
 - Phyrexian Altar on the battlefield
 - Sly Requisitioner on the battlefield
 
Steps
- Activate Phyrexian Altar by sacrificing Ozox, adding 
 - When Ozox dies, it and Sly Requisitioner trigger
 - Resolve the Ozox trigger, creating a legendary 2/1 Jumblebones creature token
 - Resolve the Sly Requisitioner trigger, creating a creature token
 - Activate Phyrexian Altar twice by sacrificing Jumblebones and the other creature token, adding 
 - When Jumblebones dies, it triggers, returning Ozox from your graveyard to your hand
 - Cast Ozox by paying 
 - Repeat
 
Results
Required Cards 3

Ozox, the Clattering King
Legendary Creature — Skeleton Noble

Phyrexian Altar
Artifact

Sly Requisitioner
Creature — Human Artificer