Daimon's purple amethyst eyes glowed behind his mask as he scanned the undead created by Reyne, whatever method she used is something he had never seen or heard before and that is a lot to say considering that necromancy is a wide spread subject back at the four galaxies.
The usage of artificial undead is a common practice among most low and middle-sized forces, especially those that operate in the shadows, so those from noble families are taught about them, this is especially true within families and forces that have had conflict with the undead races, like the Revy family so Daimon had a solid formation in the basics of necromancy.
The first rule is that a base material is always needed, then you need a type of energy and a reanimation spell, for the first requirement, there are two options, bones or flesh, the choice depends on the final purpose for which the undead will be used.