I suppose we could do non-standard advancement, but I'd prefer separate statblocks for the "individuals" vs the "conglomerates."
I'd rather just have them advance by merging. It would be less confusing than having "triple-merged Large lost souls" and the like.
I feel like we've taken that approach successfully before, too.That's alot of work for the DM. I think it best if we stat 'em out at different sizes, and find a way to make the assimilation fit that model.
That's alot of work for the DM. I think it best if we stat 'em out at different sizes, and find a way to make the assimilation fit that model.
That's OK by me, although I'd still like them gaining HD and attacks as they merge with more lost souls, since that's easy to keep track of.
Sure, that's fine.
A good example of blending both methods is the nabassu in Fiendish Codex I: Hordes of the Abyss.
"Absorb corpse" seems the best fit to me.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.