Conquer Undead

This spell takes total control over an undead creature. Roll 7d4; the current hit points of the targeted creature must be lower than the number rolled, or the spell fails. A targeted creature must also have a CR no higher than your own level. 

An undead creature affected by this spell is under your complete control permanently and will follow all commands. You can have no more controlled undead than an amount equal to your spell casting modifier. 

The undead affected by this spell share an initiative roll with you and take their own independent turns directly after your own. During which you control them as if they were their own player. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, roll an additional 3d4 for each slot level above 1st.