For you, other undead creatures are easy to read, and you have a knack for dealing with them that others lack. You can influence mindless undead and communicate rudimentary orders to your minions. You can use
Diplomacy to
Make an Impression on mindless undead or make simple requests of them. If the undead creature currently is already in the thrall of a creature whose level is higher than yours, you typically need to roll a critical success (at GM discretion).