Enthrall Undead

Choose one undead that you raised and you control (such as a zombie raised by the animate dead spell).  This undead thrall is under your control until it drops to 0 hit points or this spell is dispelled.

Undead that are your thralls do not need to have the spell that animated them (such as animate dead) re-cast on them for them to remain under your control. 

You can only own a number of undead thralls equal to half your caster level, rounded down.

When an undead thrall’s magic is dispelled, the thrall is no longer under your control and acts as the DM sees fit.