On the other hand try it with a spell not originally 0 level and the resuslts may accidentally fizzle and the god of magic espresses its disaproval. does mean you are not casting say fireball and having spell mastery and focus on it (and that isn't even pushing the limits of 3-4th level spells) Ok so you use what 2-3 feats and a 4th level spell to do 1d3 cold damage. In any case, Point Blank Shot is perfectly use-able with Rays and an excellent first level feat choice for an arcane caster (or sorcerer with elemental bloodline). A ray spell threatens a critical hit on a natural roll of 20 and deals double damage on a successful critical hit.' If a ray spell deals damage, you can score a critical hit just as if it were a weapon.

If a ray spell has a duration, it's the duration of the effect that the ray causes, not the length of time the ray itself persists. Intervening creatures and obstacles, however, can block your line of sight or provide cover for the creature at which you're aiming. You don't have to see the creature you're trying to hit, as you do with a targeted spell. As with a ranged weapon, you can fire into the dark or at an invisible creature and hope you hit something. You aim a ray as if using a ranged weapon, though typically you make a ranged touch attack rather than a normal ranged attack.

Bouncing spell and ranged touch spells