Wave of Death

A wave of pure deathly energy irradiates from you, anything within 50 feet of you must make a constitution saving throw or take 8d12 necrotic damage. Any creature that's not a construct killed by this effect rises as a zombie under the casters control after one minute. When cast with a 9th level spell slot, anything that fails the saving throw instantly dies without a save, unless it is resistant to necrotic damage, in witch case the spell will function as normal.