Keen Spellslinger (Quickling, Sorcerer Archetype)

At 2nd level, whenever a keen spellslinger casts a spell with a range of “touch” from the sorcerer’s spell list, she can deliver the spell through any light one-handed weapon she is wielding as part of a melee attack, or a hand crossbow bolt, sling bullet (or stone), or throwing dagger as a ranged attack. Instead of the free melee touch attack normally allowed to deliver the spell, a keen spellslinger can make one free melee attack (or ranged attack) with her weapon (at her highest base attack bonus) as part of casting this spell. If successful, this melee attack (or ranged attack) deals its normal damage as well as the effects of the spell. This attack uses the weapon’s critical range (20, 19–20, or 18–20 and modified by the keen weapon property or similar effects), but the spell effect only deals ×2 damage on a successful critical hit, while the weapon damage uses its own critical modifier. This abil