Your life total is equal to or greater than the highest life total among your opponents divided by Ojer Axonil's power, rounded up.
You have a way to give Ojer Axonil indestructible or protection from red if its toughness is less than the highest life total among your opponents divided by Ojer Axonil's power, rounded up.
You have an amount of.
({R} magic symbol) equal to the highest life total among your opponents divided by Ojer Axonil's power, rounded up available.
Steps
Give Ojer Axonil indestructible or protection from red, if needed.
Activate Pyrohemia by paying ({R} magic symbol) , dealing 1 damage to each creature and to you, and dealing damage equal to Ojer Axonil's power to each opponent.
If any opponent has 0 or less life, they lose the game as a state-based action.
Repeat from step 2 until each opponent has lost the game.