Warpsword

Book of Vile Darkness 3.5
By Monte Cook 

This +2 greatsword infects anyone it strikes with warp touch if the target fails a Fortitude save (DC 14).

Caster Level: 9th; Prerequisites: Craft Magic Arms and Armor, contagion, cloak of chaos; Market Price: 78,350 gp; Weight: 10 lb.