Hardcore Mana Champion?

What are your opinions on a champion that would rely completely on mana for spellcasting as well as health?

His mana bar would effectively function as the bulk of his health. In exchange, his overall mana-pool, mana regeneration, and spellcasting costs are increased at the cost of his health being almost nil.

I'm not really sure if it would offer any truly appealing gameplay, but the idea of a champion who you really have to be careful with as you cast spells and take damage seems interesting, as lots of risk must be placed while executing.

His abilities could be something along the lines of... Passive - (Name) posseses a potent mana shield that functions as his life source. Damaging abilities will first drain (Name)'s mana as well as spellcasting. If all available mana is expended, the shield will dissipate, leaving (Name) vulnerable to instant death. Overall mana and mana regeneration increased tremendously. PRIMARY/CHANNELED -Q- (Name) channels a tether of arcane energy at the target, overloading him/her with energy and dealing damage per second. The target's overall damage output will be increased. SECONDARY Q -_ (Name) implants volatile energy within his previously tethered target, causing energy to burst and damage nearby enemies around the target._ PRIMARY W- (Name) places a rune at a targeted location. The rune gradually stores up energy from enemy spellcasts and grants (Name) a slight movement speed increase when walked upon, Two runes may be active at a time. **CHANNELED/SECONDARY -W- **(Name) slams his fist in to the ground, sending a channel of magical energy, the energy will wind towards a rune. Upon contact, the rune will detonate, dealing magical damage to nearby enemies and slowing them depending on the amount of energy previously absorbed by the rune. SKILLSHOT/PRIMARY E-_ (Name) taps in to the energy within his shield to fire 3 bolts of arcane energy in a cone towards the targeted area, dealing damage to any enemies hit._ SECONDARY E- (Name) can merge the bolts in to one, dealing increased damage and stunning the target if hit. CHANNELED/R- _(Name) begins to draw in traces of leftover magical energy, greatly increasing mana regeneration at the cost of his passive's mana shield being disabled for the duration of the channel. This ability is able to be stopped at any time. If the channel is fully completed, (Name) receives increased movement speed and defensive stats. _ Of course, I'm no designer, nor am I any professional about kits and balancing. But I've always thought about how interesting such a mana hungry and dependent champion could be to the game.

This is what you think of when you don't want to study for your AP Exams which are in....7 hours. RIP.