Outrider's Bridle Chain
Source: Drop. Drops from (which has a spawn time of 15 mins) in For more toy related info check:
The 
Outrider's Bridle Chain is a toy that drops from Warleader Tome in Nagrand, Draenor, and when used, transforms your character into an orc model matching your character's sex for one hour.
Guide awaiting review
Travel to Nagrand
Head to Nagrand in Draenor, where Warleader Tome spawns. Warleader Tome has a 15-minute spawn timer and can only be looted once per day per character.
Defeat Warleader Tome
Locate and kill Warleader Tome to loot the Outrider's Bridle Chain. Note that loot from this rare is personal, meaning each player in a group must check the corpse individually — the item will not appear for everyone.
Farm on Multiple Characters
Since Warleader Tome can only be killed once per day per character, swap to additional characters and repeat the kill on each to get more attempts per day.
Tips
The loot is personal regardless of your group's loot setting, so every player farming it must be on their own character with their own daily lockout.
See the video guide for a walkthrough on locating Warleader Tome in Nagrand.
