Que for the Hk chronicle clear the first hallway and everything in lower room except the drake at the bottom of the stairs do not kill it or any drakes. After you kill the murdantix boss clear to the last boss and kill everything in the rooms behind the murdantix boss after you beat the final boss (bosses) take the portal the faceless man spawns it will take you to the beginning of the instance speak with the dwarf to finish the chronicle and loot the chest. Then walk out the portal behind you.
Now reque for the Hk chronicle walk down the hallway and kill the 7 normal drakes do not kill the broodmother. After you kill the 7 normal drakes click "leave chronicle" now reque and the 7 normal ones will respawn constantly if you leave the broodmother alive. The drakes can also be butchered and drop an assortment of crap and the mount. Took me a few hours to get the mount which if you didn't know is not BoE and can be sold on the AH although it now scales like a turtle mount and will no longer give you 110% unless you already have it.