Tomb Blade

This evil weapon entraps the souls of those it cleaves, binding their husks in servitude to the blade's master.
The full powers of this sword can be used only when the bearer has joined a unit of Skeletons or Zombies, otherwise it is treated as a magic weapon with no particular power. If the wielder slays a model with only 1 Wound on Its starting profile with the Tomb Blade, then one Skeleton or Zombie is created in its place. Models created by the Tomb Blade are added to the unit the bearer is in, armed exactly like the other rank-and-file models in the unit. The Victory points value of the unit is unaffected.