Bozak and Sivak
When the party woke up in the strange location, they discovered a pair of draconians jailed in a nearby room; a bozak and a sivak.
The jails themselves were magically warded with Silence, and the bars had been enchanted with some electric spell that prevented the two from breaking out through magic and might.
The party opted to free them, learning that the Sivak’s tongue had been cut out, explaining his lack of thanks. The bozak explained the situation to them as best he could, which did little to clear the mystery of the party’s location.