You can cast this spell only at night. Choose up to three corpses of Medium or Small Humanoids within range. Each one becomes a Ghoul under your control. As a Bonus Action on each of your turns, you can mentally command any creature you animated with this spell if the creature is within 120 feet of you. You decide what action the creature will take and where it will move on its next turn, or you can issue a general command. If you issue no commands, the creature takes the Dodge action and moves only to avoid harm. 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 before the current 24-hour period ends. Using a Higher-Level Spell Slot: If you use a level 7 spell slot, you can animate or reassert control over four Ghouls. If you use a level 8 spell slot, you can animate or reassert control over five Ghouls or two Ghasts or Wights. If you use a level 9 spell slot, you can animate or reassert control over six Ghouls, three Ghasts or Wights, or two Mummies.