How to remove the effect of the \"expansion\" with master Sangha? (Divinity: Original Sin 2)

teslaghost
Google translation
Master sang will ask to be filed. It will give you 1700 EXP and random loot.
Blessings will only temporarily cure him of debuff Decompossing, but after a short delay, re-applied, which will make it useless.
Currently no known way to cure it from its consequences; the mercy killing it seems the only option.