Innate Attack Projectile Based On Completely Inappropriate Skill

[Pseudonym]

I'm trying to simulate the effect of a magic weapon from a video game: in the realm of video games, common sense is violated all the time. Specifically, in this example, a divine spear is able to shoot seemingly divine projectiles, but doesn't require beam casting aptitude to use it.

So my query is, is there a reasonable power enhancement to allow a totally inappropriate skill to launch projectiles? I'm thinking in this example Spear, or slightly more appropriate Thrown Weapon (Spear). Googling, I feel like the second one might be justified as a 0-point feature just as it is sometimes appropriate to use gun skill for innate attacks, but I think the first one *might* be a perk level advantage because of things like Gazer, but it might also be a bit more expensive than that. So in my head I was thinking if the ability to use a "weird attribute" for one specific attack is 1 point, then using a "weird skill" for one specific attack might be worth 2 points.

Any thoughts?