Myojin of Cleansing Fire enters the battlefield with a divinity counter on it if you cast it from your hand.
Myojin of Cleansing Fire has
indestructible (Effects that say "destroy" don't destroy that permanent. An indestructible creature can't be destroyed by damage.) as long as it has a divinity counter on it.
Remove a divinity counter from Myojin of Cleansing Fire: Destroy all other creatures.