I hate those things that garrotte and then teleport your characters far apart from each other during the fight. Meazels I think.
No shot I was not prepared
I hated that in my first campaign, had pretty much most of my party silenced and teleported alone. But in my second campaign we saw them all in advance, cast slow on them all, and they only managed to get into a couple of garotting positions and teleported one person away to where I could reach them in a single move
