Reins of the Bengal Tiger is an apparently non-existent item exhibited in a YouTube video.

Blizzard customer service responded to a thread on this item by confirming that it is not currently available in the World of Warcraft.

Reins of the Bengal Tiger | 2009-08-03 17:14 | Malkorix

 Q u o t e:
 ------ IF you are going to state it does not exsist please do not post in this forum topic ------

 ------- It does not exist -------
 ------- Do not believe everything you read on the internet -------
 ------- Thanks! -------

 Q u o t e:
 -- May spawn a vendor for it in a cave hidden at STV
 -- Not the ZG Tiger mount
 -- Not the WoW TCG mount
 -- White item

 -- Gm's can not confirm the exsistance, meaning possibly a GM only Mount or Only Beta

You know this from a spurious fan-made video. You know nussing!

All joking aside, this mount is not currently available in the World of Warcraft, but it could be possible that we'd add a mount like this in the future. If you'd like to see such a mount become available, please feel free to create a post on our Suggestions forum.

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Despite this, there is much proof to say it exists such as it's database link on Wowhead .