global canceled if immortal reforms? A: Nope

[Jazzepi]

I tested it.

VQ died in enemy province (with positive friendly domain) during a battle. Was reincarnated at home province, and maintained the global Looming Hells.

Jazzepi

[Edi]

So, an immortal must in fact truly die a permanent death before his globals are taken down then. It is also a logical answer to the question, it just uses a bit different reasoning with a bit different premises.