Jareth Grim

Locations

 * Grimstorm Keep (Instance)
 * Storming the Keep Skirmish

Encountered in Quests

 * Grimstorm Keep

Drops

 * Guardian Fighter
 * Great Weapon Fighter
 * Devoted Cleric
 * Trickster Rogue
 * Control Wizard
 * Hunter Ranger
 * Misc. Loot
 * Seals