Any idea what this is? - pic

[Treba]

Saw this in the sky above Azuremyst Isle on Icecrown tonight - never seen it before:

https://imgur.com/a/WyxCFms

https://imgur.com/a/CwiwsSb

edit: now there are multiple UFOs - looks smaller though:

https://imgur.com/a/ZfDspfk

[Mercy]

Part of a stair event that the staff hosts.