Brand New Mordekaiser Rework Idea

Hey guys, I have an idea for a smexy new Morde rework. it won't be quite as detailed as my others, but I think it's pretty cool. So here it is:

PASSIVE: Raise the Shield: Once every so often, Mordekaiser's next AA will heal a bit of his missing health and give him a shield, which will last until it's broken. If Mordekaiser is in Oversoul with an ally, the ally will also be shielded.

Q: Seek and Destroy: Mordekaiser throws his mace head(it stays attached to the handle with a ghosty chain) in a line, which deals magic damage to the first enemy hit; if it's flying for more than a second, it deals extra damage and slows the target. If Morde is in Oversoul, then he can guide the flight path of his mace head with his mouse.

W: Oversoul: Mordekaiser can inhabit the body of one of his allies for a moment, becoming untargetable; while in his ally, they gain a portion of the other's AD/AP as adaptive force. Since this is the cornerstone of Morde's kit, he starts with a point in this ability. When activating it, there's a short CD before Mordekaiser can separate, unless he goes into Oversoul with another teammate, in which case there's none(BUT, there is a per-ally cooldown, kinda like Yasuo's E). Mordekaiser can't AA in Oversoul, but he can still use his other abilities.

E: Riders of the Black Wind: Mordekaiser calls up a strong gust that heals him and gives him a quick burst of movement speed. The ability has a couple charges, and in Oversoul it also heals Morde's ally.

R: Eternal Deep: Mordekaiser viciously swings around his mace with magic, dealing damage in front of him in several waves, which will root enemies caught by multiple swings. Morde's mace stays animated after casting this, so he can move around and use his other spells while it's active.

Anyways I think this is a really great rework idea, please give me your thoughts! :3