Blood Covern

You Channel your own life into the earth, draining your blood to awaken those in the graves; sacrifice any number of hit dice you have remaining; for each hit dice, you take 1d6 necrotic damage and you raise two skeletons or zombies from the earth. damage taken from this affect cannot be reduced or negated in any way.

On each of your turns, you can use a bonus action to mentally command any creature you made with this spell if the creature is within 60 feet of you (if you control multiple creatures, you can command any or all of them at the same time, issuing the same command to each one). 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 only defends itself against hostile creatures. Once given an order, the creature continues to follow it until its task is complete.

The creatures summoned are under your control for 72 hours, after which they stop obeying any command you've given them. To maintain control of the creature for another 72 hours, you must recast this spell again before the spell ends. This use of the spell reasserts your control over a number of creatures equal to twice the amount of hit dice sacrificed.