Corpse Whisper

You form a telepathic bond with a target undead creature that allows you to transmit silent messages or commands to it.  To do this it must be either a creature you can see or one that you control.  If the creature is under your control and has an INT score of 6 or less, it will automatically obey a command without question.  Other undead creatures will still hear your messages, but may or may not obey or react.  You can only maintain this connection with up to four undead creatures at a time.  You can use a bonus action to end your connection with a particular undead creature.