Bone amalgamation

This spell creats a undead survent by fusing a number of animated skelletons under your control. The skeletons need to be in range of you for the entire duration of casting.

The creature is under your control for 24 hours, after which it stops obeying any command you've given it. To maintain control of the creature for another 24 hours, you must cast this spell on the creature again before the current 24-hour period ends. This use of the spell reasserts your control over up to two creatures you have animated with this spell, rather than animating a new one.