This mod adds various features from Quark to the trial chambers including:
Relay
Foxhounds: become blue and stronger when ominous. Can be found in corridors, cubic, assembly, cargo
Forgotten: holds a sharpness 1 iron sword and power 1 bow, becomes sharpness 2 and power 2 along with higher health when ominous
Ominous vault: All enchanted books have a chance to eject a tome version of itself instead
Secret barrels: 50% chance for a rune template
Ceiling dispensers: resilience potions
…and various decoration additions to the whole structure, mostly including vertical slabs