FYI - yet another Vanilla era item that was nerfed to the ground during TBC and made to fizzle against targets above level 60:
Gnomish Mind Control Cap
Item Level 47
Binds when equipped
Head Cloth
10 Armor
+14 Spirit
Durability 70 / 70
Use: Engage in mental combat with a humanoid target to try and control their mind. If all works well, you will control the mind of the target for 30 sec …
Increased chance of failure when used against targets over level 60.
(30 Min Cooldown)
Requires Engineering (215)
https://web.archive.org/web/20160228013813/http://www.wowhead.com/item=10726/gnomish-mind-control-cap