We spent a lot of time debating what to do with that antimagic zone. All three PCs are casters; only the PC->NPC Bin was not. In the end, all our plans mattered for naught anyway.
Col
gated a 52HD Gargantuan Chaotic Evil Titan to fight Arendagrost. We called him Big Guy. Unfortunately, he wasn't used again, though Col had planned on it.
The trick was to use
maze to get rid of Big-A, then
dimension lock to prevent extraplanar travel back. It was a risk. Big-A had to go somewhere when the
maze ended, but could not return where he was due to the
lock. The DM ruled that he'd appear on a random plane and randomly rolled the Prime Material. And since he has an evil streak a mile wide, he decided to put in on Elimster's doorstep.
This isn't the first time Col's gotten in trouble this way (wayward fiend). He once told a vrok to get rid of something dangerous, but didn't say where, so it teleported it into a croweded place in Waterdeep. Col got a visit from the Symbul that time.