Corrupt Breaker (3.5e Sacrifice)
From D&D Wiki
The Gate is a path to entropy and decay. Beyond the gate lies a black sea where all things turn to dust. As a swift action, you wrap your weapon in dark flame and may ignore up to 2 points of hardness per level (maximum 20 at caster level 10) when striking objects. Against constructs, you deal an extra 1d6 damage due to it's degenerating effect on solid matter. The effect lasts for 1 round.
Health Cost: -3.