Averdrian- CONCEPT IDEA (What he Could've been)
PASSIVE: I believe that he summoned a charge up barrier that his whole kit would be centered around (it would act as a shield)
Detonate: It would be an AoE damage attack from his barrier, momentarily breaking it
Consume Spirit: An AoE Life-Steal that would give him a small amount of Health, but mainly charge up his barrier
Astral Beam: A TOGGLE that would consume his barrier that harm nearby enemies (single target, striking them) OR An ability with a VERY SMALL Cool-down, and a very slim width but moderate range (like a Lucian Q), that was a skill-shot which could pulse nearby enemies (with NO charge-up: an ALMOST INSTANT pulse that you could MISS)
Astral Barrier (ULT): It would cause his passive (his Barrier) to rapibly regenerate, and would shorten his cooldowns. It could also CONSUME HP on cast.
I Believe that this is a very interesting take on the character, and I thought that I'd just put the idea out (This is just MY idea on how he COULD be, if he ever were to be integrated back into the game)