Tentacle casters

The Tentacle Casters are a mysterious group of sorceror-minions wearing hooded robes that have been leant to Swayne by the Mindhunters. They were responsible for kidnapping Zaheer, and later aided Morduval in battle against the party. It was suspected by Little One that they were an extension of Morduval's tentacle-like alternernate form, but the fact that the ones who kidnapped Zaheer survived Morduval's demise counts against this theory.
Their only combat action is casting fireball, but they also explode into a cloud of acid when slain.