The ability to cast spells by using blades as conduits. Sub-power of Magic Weaponry. Variation of Spell Casting.
The user can either use a bladed weapon as a conduit to cast spells, or cast spells on the blade itself to enhance it.
Keyblades (Kingdom Hearts) are powerful weapons that are used as both offensive weapons and magic wands...
...wielded by keyblade wielders.
Sora (Kingdom Hearts) like all keyblade users can use his keyblade as a sword and for spell casting
Riku (Kingdom Hearts) can channel his inner darkness to his keyblade to cast spells and dark attacks
Tho just recently gaining her own keyblade, Kairi (Kingdom Hearts) has the potential for magic just like all keyblade wielders.
Roxas (Kingdom Hearts) is able to use keyblades and powerful spells because he is Sora's nobody.
Terra (Kingdom Hearts) can use the power of darkness through his keyblade with ease.
Aqua (Kingdom Hearts) is a strong keyblade master that specializes in spell casting.
Ventus (Kingdom Hearts) is a capable keyblade user and as such can use spells through his keyblade.
Vanitas (Kingdom Hearts) is dark counterpart of Ventus, that can wield his own keyblade and powerful dark spell.
Tarot (Tarot: Witch of the Black Rose) can use her sword to cast spell.