[Kameron8]

Lunar Lunatism should be allowed to be a terrifying thing, but it shouldn't be something you can spam. Retain the functionality it has on live: while under its effects, no gaining essence. Every turn, you lose a sizable portion of your essence until you hit 0. Then it ends.

You suffer no loss in identity; people still dread the portion of the fight they have to combat Lunar Lunatism. It's exceptionally powerful. But right now, it's just used over and over and over again for no cost.