Coren's Chromium Coaster

Source
This item was a possible drop from Coren Direbrew in the Grim Guzzler of Blackrock Depths during Brewfest 2009 and 2010.

It is identical to the Mirror of Truth, an item purchasable for. Both can be equipped at the same time if desired, but the buffs from the two trinkets do not stack and they share the same internal cooldown.