Would reintroducing some form of Mana Burn be plausible?
The old Passive of wit's end was really interesting. It basically provided a way to sap another champions Mana , but I don't think there's ever really been a need to re-implement such a feature. With the new itemization changes to mages however, I feel like there might be a place for an item that provides such an effect.
Alot of the mage items provide some form of mana conservation, be it by reducing mana costs, increasing mana regeneration, or returning mana to a champion in some form or another. Hell I recently played a game with a Kassadin who could literally teliport anywhere he wanted for ridiculous amounts of time consecutively. We couldn't outrun him when he gave chace, and we couldn't really catch him when he wanted to flee.
Kassadins ult is supposed to be gated by extremely high mana costs the more he uses his ult, but I didn't really see that come into play at all, and the same can be said with alot of mages by mid-late game comes along.
It could prove to be potentially difficult to balance an item like that, since using it on mages might be fine, but using it on champs that are strained for mana to begin with would be busted, but I think there's still potential. What do ya'll think?