You are truly a lord of the undead. You can create far more spawn than usual and use them as your puppets.
Benefits: Vampires with this ability can have a number of enslaved spawn totaling four times its total Hit Dice.
When this feat is taken, the vampire chooses one of the following three abilities:
Depending on the ability chosen, the vampire can hear what its spawn hears, see what it sees, or communicate telepathically with it. The vampire may exercise or end its use of this ability as a standard action and maintain its connection to its spawn for as long as it wishes. A vampire may only use this ability with one spawn at a time. The vampire and vampire spawn must be on the same plane for this ability to function. While using this ability, the vampire enters a catatonic state similar to its daily rest and is treated as helpless, though it is alerted to any jarring noises, the presence of any visible creature within 5 feet, or any damage that befalls its body.
Way of the Wicked Book Five — The Devil My Only Master. Copyright 2012, Fire Mountain Games LLC; Author: Gary McBride.