New Champion Ideas

I've always liked necromancers, with Thresh and Yorick it feels as though that topics been pretty covered. I have an Idea for another type of ultimate though. I haven't the slightest clue what the name could be, It be a mix between Nocturne, Ezreal, and Twisted Fates ultimates. A large skillshot similar to Ezreals, It would attach itself to a champion and you could activate again to lunge towards similar to Nocturnes. This ability may be too Overpowered if given to somebody like Yasuo or Master Yi. High burst, Attack Damage, Short cool-down champion. Perhaps to an Apc or low damage tank. The ability would do (scaling) 200+(25% AP)lvl 6, 250+(25% AP) lvl 11, 300+(25%AP) lvl 16. This champion I've though over and over again. The damage his ( yes I would like this to be a guy) ultimate would do would vary but nothing is set in stone. Just look at Irelia. I understand Yasuo is wind so there would be need for something original. I was thinking of a Prof. from Zaun. Perhaps with the usage of teleportations, leading into his ultimate. I want this Prof. to be a Ap burst mid. His Q ability could be called transparent blade, it would be a skillshot similar to Viktor's deathray ability, With an animation similar to Yasuo's Q. This champ would need a sort of escape and something to give him a nice difficulty (high please) his W would be similar to Leblanc's except he teleports half the distance and gains an auto-attack with additional magic damage. ( Unable to pass through walls). His ultimate would be very e reliant due to placing him toe to toe with someone else. His E would be a shield that increases the magic damage he does with his next ability ( passive) generating based on the damage he takes over time, this damage can be saved and capped at a certain point. This ability would force him to build sustain or durability, restricting how much damage He could do. His passive should be something defensive and regenerative. Why not something like Nasus except spell-vamp instead? A simple scale of spell vamp to health regeneration, every 1% spell-vamp gives .1% health regeneration. This champion could be very fun to play, some minor tweeks to his scaling and ability definitions, Perhaps some combos added to increase his difficulty and He'd be really fun to play. His weapon choice would be teleporting blades (ranged). It would be a ranged attack that wouldn't need to travel, unable to be blocked by something like Yasuo's Windwall. Please leave feedback on this idea.