The Breadth of Dragon Weaponry

This quest is unlocked at Valdrakken Renown 29 and once unlocked all weapon cosmetics he offers (20 total) become purchasable by any toon on the account. Can also receive whichever are offered thru the quest free for any toons that hit 29. Unless something has changed, my experience with weapon cosmetic reward choices seem to be limited to weapons the class normally uses and not what they can equip. So you will likely need to purchase most of the 20 you you want.

As a warlock I got offered [item=199825] (which is currently unlisted on Wowhead as a reward), along with [item=199730] and [item=199726].
Edit: Lilyoptra has reported to have got [item=199821] as a possible additional reward for a warlock.

Main and Aff spec-1st toon to get to this renown. Maybe since he sells 20 total there is some variety in what he pulls out of his inventory? (Actually had this happen for Centaur Renown 7 Heads-each of the 1st 6 alts I ran thru got offered 6 then 5 then 4,3,2,1 choices so I assumed that the other 6 had to be purchased. 7th alt comes thru and the other 6 options were then offered.) Anyway on this quest, my 2nd toon thru, a Fury Warrior with loot spec of prot, just got offered 4: [item=199702], a PA, 2H Axe and an OH (sadly did not make note of the specific items, other than the one I took)