Help me build an Aberration

[Kristivas]

OK, long story short, the PCs will be trying to prevent this cult from summoning something twisted.

At the very end of the this part of the campaign, they'll probably have to fight the thing.

I want it to be vile and horrid, Cthullu-like.. very alien, very scary.

I'd wager to say the PCs will be around 10-12th level by then. I'd like for it to be defeatable, but pretty darn tough.

 

[Infiniti2000]

Lords of Madness -- Use a grell something-or-other (perhaps pseudonatural). If you don't have the book, get it.

 

[SteelDraco]

Psuedonatural hydra! Because nothing says aberration like tentacles.

 

[Infiniti2000]

Because nothing says aberration like tentacles.

That's why you want a grell, because a grell is pretty much just a bunch of tentacles attached to a floating ball.

 

[Kristivas]

I kinda want it to crawl/slither out of the hole.. like a blob of flesh with some razorblades stickin' out. That way it can attack multiple foes, slither around, and just be horrible.

 

[Enamel_32]

I'd give it a few legs, and lots of bladed tentacles... and maybe insectoid wings?

 

[Kristivas]

I'm thinking no legs or head or discernable limbs. Kinda like a proteus, if anyone knows what I'm talking about. How would I do HD and such for it?

 

[Dannyalcatraz]

How to make an aberration:

1) Pick a base creature

2) Open your copy of WOTC's Savage Species

3) Pick a template and add it

4) Repeat steps 2-3 until satisfied.

You could have a Gelatinous Insectoid Multiheaded Learnean Pyro _______________ in just a few minutes.

 

[shilsen]

Simplest way to do it - pick a CR 10-12ish creature which has the mechanical abilities you think will make for a fun encounter. And then come up with a description in game which matches the flavor you're looking for, while retaining the mechanics.