Tiberian slashes brutally at the warforged who barely steps back out of the way of the hallberd.
Grimm approaches Tiberian facing off with the warforged in the staircase carefully. The closest Grimm can get is around the corner from the warforged. (Warforged has cover) He swings his axe, but the warforged is easily able to duck behind the wall and avoid the blow from his new attacker.
About halfway between Lancel and the rest of the party another sewer valve opens up, shootig filth into the sewage channel.
The warforged, moving as if in considerable pain, clumsily takes a stab at Tiberian, missing by a considerable sight.
Lancel stands, undecided, scanning the sewer cross section for signs of the fleeing shifter, alert if they should reappear.
Koren focuses the power of his mind and launches it yet again at the warforged. The warforged assassin's mind appears to put up a small defense against the dream energy before his defenses, mind, and body give way to the power of Koren's mind. The warforged's head plates buckle, and he fall off the stairs at the feet of Tiberian and Grim with a dull, wet thud.