Lord of Undeath

Whenever you reduce a humanoid to 0 hit points, you can choose to reanimate it. If you do, the creature rises at the beginning of its next turn as a zombie permanently under your control, following verbal commands to the best of its ability. You can control a number of zombies equal to your Intelligence modifier. Any number of Zombies you create above that number will cause that number of previous Zombies to immediately die.