Looking back on it I have to admit it's worded fairly poorly. The intent has always been that they won't contain raid mounts, but can contain mounts from anywhere else. It's really at the discretion of the designers to choose the mounts, we just didn't want people to think it'd be dropping Mimiron's Head or anything like that. You're right, it's a bit misleading. I wish we had caught that.
Sorry for the confusion.
For the love of god, tell me in what universe does녹색 원시비룡 고삐흰색 북극곰 고삐
Drop from DUNGEONS. Last I Checked, Blizzard, Reins of the Green Proto-Drake is for hatching a 3-day egg (USED to be 7!!). This Reins of the White Polar Bear comes from doing Storm Peak dailies.