Pathfinder 1e Spell Transmutation

Blade Lash

Your weapon elongates and becomes whiplike.

School: Transmutation
Casting Time: 1 standard action
Range: Touch
Target: Your melee weapon
Duration: Instantaneous
Saving Throw: None
Spell Resistance: No
Components: V S

Your weapon elongates and becomes whiplike. As part of casting this spell, you can use this weapon to attempt a trip combat maneuver against one creature within 20 feet, and you gain a +10 bonus on your roll, after which the weapon returns to its previous form.