<Undead Hound>
Level 103 Heroic ^^^
Grouped with Parvazt the Handler.
Rooted while Parvazt has it leashed and is immune to all damage.
Every so often during the fight, an organ will drop from the zombie dog called 'a dislodged organ' which must be burned asap or gotten out of range of. Watch for the red text 'An organ spillsout of Demontail as he is jerked back to Parvazt!'. When the organ is destroyed it will cause damage to Demontail and enough times will kill it off.
