Cauldron Crab

So, in my CotMA campaign, one of the characters, Oryx, got a bad draw (Void) from a Deck of Many Things and his soul is trapped... somewhere...

Anyway, he's encountered the spectre of an evil wizard.  Is he real, perhaps another lost soul, or is he a figment of Oryx's imagination?  He may never know.

He did discover that the wizard has been brewing up a monster in a large cauldron.  I'm calling it a cauldron crab.

I thought you might like to see a picture that I mocked up.  Enjoy!  Picture removed.  I shouldn't have used the stock art here.  Apologies to the artist.

Cauldron Crab

HD: 4

AC: 4 (or AC 0 see below)

#AT: 2

D/AT: 2d8/1d6

MV: 9"

SZ: Large

Morale: 9

Treasure: Nil

Created from baby crustaceans, rare herbs and demon ichor, the cauldron crab is a monster that dark wizards can use to protect their labs or to serve as loyal bodyguards.  Created through a long thaumaturgical process, the cauldron crab must be fed fresh meat at the conclusion or the wizard risks the crab turning its appetites upon him!

In combat, the cauldron crab will try to use its iron shell to keep opponents at bay.  If attacked in melee by one or two opponents, they will need to hit its formidable AC of 0.  If attacked in melee by 3 or more opponents, only one (randomly chosen) will strike AC 0, the rest will be able to attack its softer chiton armor of AC 4.

Once it has been reduced to 8 HPs or less, the crab will retreat into the cauldron and attempt to hide from its attackers.