Tower of Flesh
From Warhammer 40k - Lexicanum
The Tower of Flesh was a horrifying Dark Eldar device created by the Haemonculus Coven of the Thirteen Scars.[1a]
A massive living siege bastion created under Hexachires, the tower is made up of the flesh of untold numbers of tormented prisoners and slaves. Normally serving as the headquarters for the Thirteen Scars in Commorragh, it was used as a mobile fortress during the Battle of Belial IV, where it devastated Fabius Bile's forces and destroyed several Chaos Titans.[1b] Fabius is able to disable the tower with a modified plague to infect its bio-structure. He then destroyed it by having his Word Bearers Diabolist Saqqara Ur-Damak Thresh summon Daemons which consumed it.[1c]