Etla Isle

Hey Derp! Thanks for your consideration.

1) The sprite, Faravahar, is sentient and generally pissed off at its situation (and a bit crazy after a few centuries). Its only interaction with the world is through expulsion of its lightning power to inflict harm, which is almost exclusively at Red's discretion.

Red has no soul tied to his body, and the sword, Fravashi, was sealed hundreds of years ago; that seal is deteriorating with extended abuse. Faravahar's soul and powers have started "leaking" into Red. As a result, Red now has some autonomy with respect to the sword's lightning magic. The cost is Red's natural eyesight and an intermingling of the two creatures' personalities. (Red's discipline and training that helped suppress his early feral tendencies is being gradually undone. This is a sub-plot I'd be curious to play out.)

When Red and Fravashi are separated beyond a few meters, Red's lightning power diminishes substantially but not completely. The sword's diminishes only somewhat, but since its soul is divided between the sword and Red, both entities' powers will continue to weaken with time until Faravahar eventually dies (I'm thinking on the order of several weeks). The magical attacks that Red can still muster take longer to prepare, and the more potent ones on the RPR Abilities page are unobtainable. The sprite is a malicious prick and doesn't take kindly to new weilders, though (bzzt), and if stolen Red will likely make his top priority retrieving it.

2+3) I see your points. I've fleshed out the S and R below to help clarify. Even so, the resistance to healing/utility magic is a fair concession and I've included it. In short, the best way to hurt him is to hit him really hard and/or really accurately, and taking Fravashi out of the equation helps.
   Strengths:
      1. Lightning magic
      2. Physical damage output
      3. Straight-line speed
   Resistances:
      1. Destructive magic
         - Magic intended to break down Red's corporeal body; lightning, fire, ice, etc.
         - Tangential effects, like ice's property of restricting motion, are still effective. Fire, used right, can interfere with his thermal vision in lieu of the damage it would normally inflict.
         - The only exception to the above is with respect to lightning. Electricity normally causes burns and musculature to seize and convulse, but because of Red's relationship with the sword this element is almost totally null against him. If Fravashi is absent, the tangential effects are mitigated but not null.
      2. Healing magic
         - Magic intended to restore Red's corporeal body. He's stuck mostly relying on his natural healing factor. If this magic is explicitly holy in properties, it actually causes harm.
         - The only exception to this is Red's ability, "Cautery," outlined on RPR. This only works because it can close wounds by inflicting damage in a targeted way and by using his own brand. Should have included it in the app too, so I will here:
         "Cautery" - He can channel his electrical magic through open wounds and burn them shut. The process is rather painful, despite his resistance to the element, because he's literally turning his offensive magic against himself. The more serious the wound, the more time and energy needed to perform the task and the more painful it is. Mostly useful for repairing wing punctures and minor wounds.
      3. Utility magic
      4. Poison

If this doesn't clear things up, or if additional questions come up, I'm game.