Oh, and two other quick matters.
One, here is a list of the items on Dcrhini's body:
1 Full Plate (Dwarf size) +3
1 Gauntlets of Ogre Power +4
1 Ring of Protection +3
1 Spiked Chain +2 (Cold Iron, Stunning Surge)
2 Potions of Cure Critical Wounds
2 Scrolls Cause Critical Wounds
Two, Jared, I will leave the time frame of how long you were imprisoned up to you. The Cagewrights have been planning, testing and building this ritual for tens, if not hundreds, of years. The test to create a stable, direct link to the planes of the Abyss could have been one of the first, or just the first successful one.
So if you have time, you can write up a backstory from any era in Faerun. Based on what you come up with, it could affect what happens AFTER you all complete the quest... provided ya'll survive.