Rift Quest:A Lord of Beasts and Men  

Rift 2.0: Storm Legion Nov. 13, 2012

having poisoned him in the previous quest, Thetormon is significantly weakened and can be killed. he will summon some followers and you need to kill them before re-focusing on him. The three together is too much DPS to just power through.

Thetormon has some big smash attack that he will telegraph with a white circle on the ground. Joust as required, or stay at range. Pets do not seem to be affected by his smash.