I realize this is old now, but since I didn't see them listed:
[*] Ceannaire says 'You aren't one of us! You can't possibly expect to use magic.' [*] Ceannaire begins to cast a spell. <Ad Hominem> [*] For a short while your reality becomes false. [*] Ceannaire says 'Upworlders aren't built well. Therefore you, upworlder, are weak and I am strong!' [*] Ceannaire begins to cast a spell. <Poison The Well> [*] You resist the Poison The Well spell!
Ceannaire is a telmira mob, we found it down near the red ring. It seemed to wander a bit so I'm not sure if that is where it spawned. It cast some sort of silence on one of the healers - looked to be a single target but I'm not certain. Other than that it was pretty easy. Only thing it dropped was the mask, which our SK was thrilled about!