This toy, called Oeil de l'Omnivoyant
is obtained in Antoran Wastes. You have to grind 1000 Intact Demon eyes which you can obtain from most demons. The northern part of the zone seems to be the most efficient! (Also don't forget to interact with the All-Seers focus first, to be able to have the eyes drop)
This item is kinda fun and broken... It gives you mind vision on the target, and by using the extra button, you will send a "whisper" to them. This somehow makes them dismount. This gives you a toy that instantly dismounts anyone, including your own faction!... Since the toy has no limit to enemies only. Even better is that by combining this with the new feature / bug that came in Shadowlands, were you can cast anything in the air if you use it while mounted and while having the "Auto Dismount in Flight" active in the Interface, you can dismount ppl instantly even while in the air yourself!
Here is the macro to do so:
/cast all-seer's eye
It is way better than Lance-filet automatique 5000
, since it has an insane 150 yards range! It also works with Warmode off!
There are many places you could have fun with this item, however the most reliable locations are probably where the enemy can't survive even with slow fall effects.... Such as Netherstorm when people are flying towards Tempest Keep! Or maybe the elite mobs in the Maw