ToME: the Tales of Maj'Eyal

Looks like he can kill himself on enthropy. but its impossible to sustain such long on that place. any suggestions?

Spoilers, and also, correlation =/= causality. However:

I ran away a lot, killing other things on the "maybe it's like tentacle guy with too many consonants in its name" theory. I found a book (???) and received a notation in red text that The One That Writes had grown in power. However, when I found it again, it had lost the Invulnerable tag, which worked for me!

Yup, just find the books. Or kill his minions. Seems to lose a % for each minion you kill.

My bad, wrong topic. Btw, you need to touch 3 tomes to reveal his unvulrenability. Its kinda hard to locate em because they are dark as ground