Rhemic Empire (2)

Who knows?
Probably some kind of barrier.

I know someone who might know, but they definitely won't tell you; they'll just rub their hands gleefully, waiting for the failure.

I've changed my mind about sending C2 into invisibility. The summoner could have this:

Ultimate ability — Seventh Element
Initiative drops to 0 for the next turn. On the next turn, deals 400 true damage in a 6x6 area at any distance from the character (restriction: battlefield). This spell cannot be dodged.
Cost: 500
Cooldown: 2 turns

This means we need to hit it with shackles immediately. From the cell I indicated – the upper gray square of the side corridor. If the demon decides to switch targets to C2, although it's unlikely considering it has an order, Meretta can still shoot it from invisibility in that position.