Alsyn, the possessed.
Melee uses mana
Lore, TL:DR because I am lazy: Alsyn was a Zaunite soldier, who was possessed upon grasping a cursed gladius. In human form, he is a sadistic, violent individual, and when possessed, he becomes an uncontrollable beast. Since being cursed, he has become a nomad, living in the shadow isles.
Due to being a form switching champ, we will start with his ult
R: Resist/Give in 4 second cooldown, no cost
Alsyn switches to and from his possessed and human forms.
Human: 125 range melee, all damage dealt causes an additional 10% magic damage.
Spirit: 175 range melee, all damage dealt causes an additional 50% magic damage, but you cannot issue commands for movement or attacks while in this form. (More powerful, at the cost of control)
Passive: Spectral skin Alsyn takes 5/10/15% reduced physical damage, doubled in spirit form. This is halved versus towers.
Q (Human): Hunting 50 mana, 6 second cooldown
Stealth for 1 second, and gain 40/50/60/70/80% movement speed for the duration, doubled if moving towards an enemy champion.
Q (Spirit): Target 50 mana, 2 second cooldown
Commands the spirit to attack a target unit. The spirit will attempt to attack the target for 5 seconds or until issued new orders, gaining 30% movement speed, dealing 50/55/60/65/70 (+.2 AD) as bonus physical damage on hit, and healing for 10% the damage dealt to that target.
W (Human): Daze 50 mana, 10 second cooldown
Slaps a target enemy with the flat of your blade, stunning them for 1 second and dealing 50/60/70/80/90 (+.2 AD) physical damage.
W (Spirit): Drag 70 mana, 10 second cooldown
Binds a target enemy to you, tethering them (900 tether range) for 4 seconds or until you reactivate the ability. If they attemt to break the tether, they are brought back in range and dealt 80/90/100/110/120 (+.3 AD) Physical damage.
E (Human): Agony 80 mana, 4 second cooldown
Your next basic attack rends the target, dealing 100/110/120/130/140 (+.5 AD) bonus physical damage and slowing them by 30%.
E (Spirit): Lash 40 mana, 5 second cooldown
The spirit unleashes its rage, dealing 90/120/150/180/210 physical damage to all nearby enemy units.
Pros (Human): Very nimble and difficult to peel High CC Resistant to physical damage Cons (Human): Squishy (ish) Mediocre damage
Pros (Spirit) What is AD? I dont care about that. Unbreakable tether. High as fuck damage
Cons (Spirit): No CC (besides "You cant get more than 900 range from me") You cant tell it to move/attack without Q. Immobile. You cant tell it to retreat.