Beckon Evil

This spell creates an undead servant. Choose a pile of bones or a corpse of a Medium or Small humanoid within range. Your spell creates a false soul using the material components and bounds it to the phylactery. You then connect the phylactery to the pile of bones or corpse and smash the phylactery. The result is the successful creation of an undead that is bound to you until it is destroyed. This bond strains your soul immensely, and you cannot be bound to more than two creatures at a time. The creature uses the Boneclaw stat block found in Mordenkainen's Tome of Foes.

On each of your turns, you can use a bonus action to mentally command the creature if it is within 60 of you. You decide what action the creature will take and where it will move during its next turn, or you can issue a general command, such as to guard a particular chamber or corridor. If you issue no commands, the creature will use its turn attacking any other creature that is hostile towards you. Once given an order, the creature continues to follow it until its task is complete.

The creature is bound to you until it is destroyed, but does not recover from damage naturally. In order for the creature to use its rejuvenation ability you must expend one spell slot of 8th level, or higher, or the creature is destroyed. Additionally every time one of the your creatures made by this spell uses its rejuvenation ability, your hit point maximum is decreased by 5 as part of your soul is destroyed. All hit points lost to the effects of this spell cannot be reduced or nullified and can only be restored by straining the wish spell. If your hit point maximum is reduced to 0 by this effect, your soul is completely destroyed and cannot be restored.

At Higher Levels. When you cast this spell using a spell slot of 9th level, you animate or restore one additional undead creatures for each slot level above 8th. Each of the creatures must come from a different corpse or pile of bones and requires an additional phylactery worth at least 20 000 gold pieces.