Among the myriad of other changes coming in Patch 29.0, Paladins are also going to be treated to a new Legendary hero skin featuring the man, the myth, the legend himself. It's LLEEEEEEEEROOOOOOOOYYY JEEEEEENKINNNNSSS!!! Leeroy himself has already been featured as a regular alternate hero for paladin, but now you'll get to see him in full animated glory, just in time for him to return to Standard in Year of the Pegasus. And he even has chicken!

If this is getting you in the mood to watch the original video, you may be upset to learn that the original YouTube upload sadly no longer exists because the channel it was hosted on was hacked and terminated, but many people have got you covered with reuploads. This one in particular is higher-definition reupload.

He will be available starting on March 19th. It was not made apparent how you would acquire him, but if the other Legendary skins are anything to off of, your only option will be to pay 2500 Runestones. You can't buy 2500 Runestones from the shop, but you can buy 2000 for $19.99 USD and then buy 500 for $4.99 USD.

Quote From PlayHearthstone

Get the most legendary of Legendary Hero Skins: Leeroy the Legend! From pauldrons to poultry, this Paladin has it all. Available starting March 19. 

Leeroy the Legend
Leeroy the Legend Emotes