uncommon evocation force magus 

Cast [>] somatic

Range varies; Targets 1 creature

You briefly turn your attack into pure force to bypass your opponent's defenses. Choose a target within your reach, or within the reach of a melee weapon you're wielding.

If you can use Spellstrike with a ranged weapon (with the starlit span hybrid study, for example), you can target a creature in the first range increment of your ranged weapon. For an instant, you transform your weapon or unarmed attack into a spike of pure force, replacing all its normal statistics and abilities. The force fang automatically deals 1d4+1 force damage to the target.

Heightened (+2) The damage increases by 1d4+1.

Secrets of Magic, page 143.