Demesne of Undeath

A favorite of liches and other great fell powers, allowing its caster to dominate a large swathe of land in a single blow. When you cast this spell, plunge the dagger into the corpse required to cast this spell; the corpse is consumed and the dagger hovers in place, charged with unholy energy.

For the duration, any humanoid corpse within a 1 mile radius of the dagger rises as a skeleton or zombie as appropriate. Undead created through use of this spell are under your control for the duration, after which the control ends; you can recast the spell in the same spot to keep them under your control.

Any undead with an Intelligence score less than 8 that enters the area for the first time, or one that begins its turn there, must succeed on a Charisma saving throw or be put under your command as well. You know the location of any undead within the region of this spell, regardless of if they are under your control or not. While within the demesne, you can command any number of undead telepathically as a bonus action. If given no commands, undead act as normal for their alignment.

Undead created by this spell remain within its bounds unless forcibly moved. If undead are removed from the area, your control over them ceases.

The spell can be ended early if the dagger is removed from the area, or if you choose to end it as an action. If you cast this spell in the same spot every day for a year, it becomes permanent, consuming the dagger in the process. After this point, only casting a hallow spell on the spot where the demesne itself was cast will dispel it.