Ghilbrizeth:

The troll staggers a step, then two, under the force of a blow that would kill a normal man. Pulling himself back up to full height, Ghil steps once more into the fray as his shoulder pulls itself back into socket with an audible pop. Grinning savagely, he swings again.

Spoiler: OOC/Rolls
Show

So, Ghil takes 8 damage and heals 2 from regeneration. Maybe 8 damage shouldn't have been enough to dislocate a shoulder, but it's all fluff to give the in-character knowledge of his regeneration ability.

Attack: (1d20+10)[26], damage (2d4+9)[16]