You touch a creature, which must succeed on a Wisdom saving throw or become cursed for the duration. Until the curse ends, the target suffers one of the following effects of your choice:
• Choose one ability. The target has Disadvantage on ability checks and saving throws made with that ability.
• The target has Disadvantage on attack rolls against you.
• In combat, the target must succeed on a Wisdom saving throw at the start of each of its turns or be forced to take the Dodge action on that turn.
• If you deal damage to the target with an attack roll or a spell, the target takes an extra 1d8 Necrotic damage.
Using a Higher-Level Spell Slot. If you cast this spell using a level 4 spell slot, you can maintain Concentration on it for up to 10 minutes. If you use a level 5+ spell slot, the spell doesn't require Concentration, and the duration becomes 8 hours (level 5-6 slot) or 24 hours (level 7-8 slot). If you use a level 9 spell slot, the spell lasts until dispelled.
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 four creatures you have animated with this spell rather than animating a new creature.
Using a Higher-Level Spell Slot. You animate or reassert control over two additional Undead creatures for each spell slot level above 3. Each of the creatures must come from a different corpse or pile of bones.
Choose a pile of bones or a corpse of a Medium or Small Humanoid within range. The target becomes an Undead creature: a Skeleton if you chose bones or a Zombie if you chose a corpse.
On each of your turns, you can take 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 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 on its next turn, or you can issue a general command, such as to guard a chamber or corridor. If you issue no commands, the creature takes the Dodge action and moves only to avoid harm. Once given an order, the creature continues to follow it until its task is complete.
A creature you touch makes a Constitution saving throw, taking 2d10 Necrotic damage on a failed save or half as much damage on a successful one.
Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 1.