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, protection from red and/or flying 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 mana available equal to twice the highest life total among your opponents divided by Ojer Axonil's power, rounded up.
Steps
Give Ojer Axonil indestructible, protection from red and/or flying, if needed.
Activate Warmonger by paying ({2} magic symbol) .
Repeat step 2 as desired.
Resolve the first Warmonger trigger, dealing 1 damage to each creature without flying 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 4 until each opponent has lost the game.