Negative Energy Flood

You send ribbons of negative energy at one
creature. Unless the target is undead, it makes a
Con save, taking 5d12 necrotic damage on a
failure, or half as much on a success. A target
killed by this damage rises up as a zombie at the
start of your next turn. The zombie pursues
whatever creature it can see that is closest to it.
If you target an undead with this spell, the target
doesn't make a saving throw. Instead, roll 5d12.
The target gains half the total as tempo