Black Mana Flood

You flood yourself with Black Mana.  For the duration, you can animate the bodies of dead creatures within 120 feet of you.  You can animate up to 100 creatures this way, and they obey your verbal commands absolutely. For the duration, you can end the spell early by expending the black mana and emitting energy in a 5 by 60 foot line.  Creatures in this line must make a constitution saving throw or take 10d6 necrotic damage or 10d6 force damage on a failed save, or half as much damage on a successful one.  When the spell ends, all animated creatures crumple into dust.