User blog comment:Emptylord/Season 3 - PBE Patch Notes/@comment-122.61.183.121-20121118061549/@comment-5045559-20121118070137

It's a mana item that heals the user whenever he uses mana. It was revealed by dataming the PBE update, but Riot said it it's nowhere close to a fine state so they won't release it anytime soon.

However, there is a bug that allows bots like Swain to buy it on the PBE (bots even use removed summoner spells like Surge/Promote so no wonder) and it's beastly on him. That caused much QQ and shutdowns.