User blog comment:Degritone/Tonan, the Essence Thief/@comment-7709681-20141117025001

Nope please no more Mana Burn, LoL had it (E.g.: Wit's End and Kassadin's W) and Riot took it away for very good reasons (Because it was deemed as an "Anti-Fun Mechanic") and won't come back.

And the innate passive isn't properly worded, for what I understood is just "Each time he deals damage with an ability he heals himself for a value equal to 3% of max. mana"