How about a cantrip for Pathfinder?
School evocation [force]; Level magus 0, sorcerer/wizard 0
Casting Time 1 standard action
Components V, S
Range close (25 ft. + 5 ft./2 levels)
Saving Throw none; Spell Resistance yes
You throw an unerring ball of force at a target in range. The target takes 1d2 points of force damage.
The ball strikes unerringly, even if the target is in melee combat, so long as it has less than total cover or total concealment. Specific parts of a creature can’t be singled out. Objects are not damaged by the spell. However, spells like shield block the effects of the spell.