I think it would be theme appropriate if priests could lift curses that come from dying to bosses but at the same time I don't think they should be rendered meaningless.

I'm suggesting get an ability something like

Amarasetsu's Cleansing Fire
Min level:70
Cast time: 10 seconds
Cooldown 8 hours
Power cost: all
Effect: The devout priest spends all their power to call on Amarasetsu to burn away a 1 curse on a player.


I feel like this wouldn't be op and would leave a few options.

If this still seems OP then put an uncursed marker on a player so they can't be uncursed this way for 24 hours. Something flavorful like Warmed by Amarasetsu.

Or have it inconvenience the caster by lowering their max power per cast for 8 hoursby say 30. Then a priest might cast it once but wouldn't spam it.

They could be weakened by channeling so much of Amarasetsu's power.

What do you think?