This drops from Chrono-Lord Deios in the Dawn of the Infinite dungeon.
One of the five dragon color customizations seems to be a guaranteed drop for every member of the group.

EDIT: as speculated in the comments under this post, we have gotten confirmation from glassleo's post that this was bugged and hopefully has been fixed as of oct 13 2023

評論來自 Asutori

I thought these were guaranteed but I for the life of me cant get this last one. Might be bugged considering every time I do this dungeon with pugs or my friends I see one drop for everyone EXCEPT me. I foolishly tried writing a ticket and they basically just said "not our problem you are unlucky sucks" so either I really am unlucky and somehow am the only one not getting it when everyone else I know/saw got one guaranteed every time OR it really is bugged and their service team doesn't care to help.

評論來自 Esinar

I can confirm this drops on heroic difficulty, although the chance appears low. Saw this drop for someone in my group after 13 runs.

評論來自 glassleo

Update: Thank you everyone for reporting this to Blizzard. They have now finally hotfixed the drop.

WoW Hotfixes - October 13, 2023 (Source)

Fixed an issue that could prevent “Windborne Velocidrake: Visage of the Infinite” from dropping for some players.

Original comment:

The drop is definitely bugged on Mythic.

Your first 5 kills of Chrono-Lord Deios are supposed to give you a guaranteed random Infinite dragon scale. Behind the scenes, Blizzard is tracking this by flagging a hidden account-wide quest as complete when you get one of the scales so that a duplicate will not drop for you another time.

The problem is that they messed up this flag and one of the other scales is incorrectly flagging the hidden quest for the Velocidrake as complete.

Please report the bug to Blizzard. Despite many bug reports we are still getting GMs telling us there is no bug and "the droprate is just low" which is completely wrong since it's supposed to be 100% on Mythic assuming you've collected the other 4 scales.

On Heroic they are not guaranteed drops. Unfortunately you are likely permanenty bricked on Heroic too if you have received the other 4 scales from Mythic since the game thinks it has already dropped for you.

評論來自 EagleFangKarate

as of october 13th hotfixes:

Fixed an issue that could prevent "Windborne Velocidrake: Visage of the Infinite" from dropping for some players.

評論來自 Dianora

Had this dropped for me today on a M+2 Murozond's Rise. I click on it to learn it but it doesn't seem to unlock the visage option for the dragonriding dragon. What's more in the Manuscripts addon, it shows that I've learn all 5 of these visage, but that's obviously not the case.