Wraithstrike

(Complete Adventurer, DnD 3.5)

Transmutation

Level: ; Assassin 2; Sorcerer/Wizard 2
Components: V, S
Casting Time: 1 swift action
Range: Personal
Target: You
Duration: 1 round

When you cast this spell, your melee weapons or natural weapons become ghostly and nearly transparent for a brief time.
While this spell is in effect, your melee attacks are resolved as melee touch attacks rather than normal melee attacks.