Spawns as you complete the group mission "King of the Beasts" (see this quest entry for details).
Dirk of the Groundskeeper
Greater Alaran Cantrip
Heartwood Splinter
Joceil's Exquisite Plate Mask
Karn's Carved Jade Ring
Median Alaran Cantrip
Ribcrusher's Amice
Scepter of the Rat Queen
Scum-Covered Crystal
Shield of Blightwing
Stonebark's Protective Amulet