Abalach-Re, Five-Headed dragon Form (whut)

Our Dark sun game's been running for more than a year now, and it's finally time for my players to fight a sorcerer-monarch for the first time. I've been running my adaptation of the Forest Maker 2E module for 4E since they began at level 16.

At level 18, they have just finished disrupting Abalach's play for a quickened draconic ascension. I modeled it a level 19 skill challenge (which they succeeded at 12 successes and 1 failure), so they are able to channel the ritual to grant themselves a +4 bonus to attack and damage rolls, while Abalach-Re's draconic form is unstable.

Here's my custom stats for her draconic form. It's still at level 23 and as such is extremely difficult for 5 level 18 adventurers with 1 level 17 6th man, but the +4 attacks will give them a fighting chance. Besides, this is Dark Sun. Sorcerer-monarchs will always be hard in my DS games.

Destroying this form will not kill Abalach - it will only revert her to her Creature Catalog form, at which point she tries to escape. (Of course, if the players think they can still fight a full-hp level 23 human Abalach, that's their TPK.)

Why did I turn her into a 5-headed dragon? Doesn't that scream "Tiamat clone?" Well, maybe, but it's one of my only three huge dragon minis, and I have other plans for the dracolich and huge red.

Meta: I made the statblock with Masterplan and then exported the html file into this blog. I think the CSS will mess with the page a bit, but that's alright. :P As long as the statblock itself is in a format I like, it's all good. And damn, this statblock is LONG. Maybe I should get rid of all the fluff entries.