1. Retinus the Seeker - Vale.It's in Uldum.2. Vil'thik Hatchling - Uldum.It's in the Vale of Eternal blossoms.3. There is 意志破坏者伊弗里姆 in Uldum. He drops 廉价的克熙尔伪装.
A word of warning, don't be like me and think you can breeze through 鲜血、尘土与骸骨 by rounding up large packs and aoe'ing them down. A lot of the mobs involved drops a nasty, stacking debuff ( 心能灌注 )on you that reduces your hp by 5% per stack, and it stacks faster than you think. I saw a tank starting out with ~600k hp get reduced to about 30k hp, at which point the other stacking DoT the mobs put up ( 心能爆裂 ), quickly becomes lethal.