Ehre The Knights Reaper

I'll see if I can put together a concept sketch for the champion, don't get your hopes too high though as I'm not much of an artist lol.

The concept of this champ falls around a possible melee carry/assassin/bruiser depending on how you would build him. Numbers are obviously up for debate.

This champion was once a soldier for one of the countries of Runterra, though he refuses to say which. His time as a soldier though hasn't ended, as he was forced into service on the Shadow Isles and only now has been allowed to leave after showing loyalty to it's cause, however. While he showed loyalty, his plan was to unravel the sinister plans of the SI and bring an end to their enslavement of the undead. With his unique abilities, he plans to put an end to his fellow specters once and for all.

Passive: Spirit Essence: Every third basic attack will restore a percentage of Ehre' health and mana. Higher AD will restore more health and higher AP will increase mana return.

Q: Spirit Charge: Ehre sends forth his specter, striking all opponents in it's way until it reaches it's max range or strikes an enemy champion.
This is a straight line skill shot. This ability can apply on hit effects and deals physical damage but scales with AD and AP and cannot crit. This and his W adds some opportunity to diversify builds hopefully without being a toxic element. (One thing to note, this ability would have a .25 second cast time and .25 second travel time, during which time Ehre would be immobile, meaning he can't simply throw this out whenever, but must think before using it.)

W: Ethereal Blade: Ehre charges his blade with his own spirit, granting him magic damage on each basic attack, he can activate this ability to grant him a short burst of attack speed. Again, this ability allows for differing builds, though it useful even if building only AD and no AP as it can grant attack speed, useful in duels.

E: Soul Surge: Ehre strikes the ground with his blade, sending out a shockwave. A basic attack modifier. Grants some bonus wave clear and a little bit of burst. The size of the shock wave would be similar to that of Hydra passive though would not really scale as high until higher ranks of the ability. And yes, this ability can be used in conjunction with Spirit Charge for a small ranged AoE ability, though you would be blowing two cooldowns and taking a risk for that. The ability could also reset your attack timer.
EDIT: As per suggestion, I'm adding on that the ability may possess a slow to add more synergy to Q.

R: Spectral Duelist: Ehre' Specter fights alongside him for a short time, striking Ehre' opponent just after he does. His big dueling ability. I imagine start out the duration at around four to five seconds, though allow him to extend the duration by .25 to .5 seconds per basic attack that Ehre performs, not the specter. The specter acts as a double strike, similar to that of Yi or Lucian, though on a fairly significant cooldown. Similarly to them, it only deals 50% damage and applies on hit effects. However, unlike them, it cannot crit.

Obviously, the numbers would need a lot of looking at to make sure the kit was balanced. However I think that the synergy of the kit would work really well. Q with E, W and E with R. Obviously though, improvements can be made, so feedback is more than welcome!