Ultimate Finger of Death

You send negative energy coursing through all creatures that you can see within range, causing them searing pain. The targets must make a Constitution saving throw. They take 6d12 + 50 necrotic damage on a failed save, or half as much damage on a successful one.

A humanoid killed by this spell rises at the start of your next turn as a zombie that is permanently under your command, following your verbal orders to the best of its ability.

Any dead or undead within the range are now under your control as a zombie.

If a zombie under your control is reduced to 0 hit points, it immediately dies and you gain temporary hit points equal to its hit point maximum.  The creature that reduced it to 0 hit points instantly takes 3d8 necrotic damage.