Asimov's Animate Dead

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 verbally command, in common, any creature made with this spell, if the creature is within 60 feet of you (you can command multiple 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.

The creature must obey the following laws at all times:

1. This creature cannot harm any other creature, or allow another creature to come to harm through inaction.
2. This creature must obey any commands given to it in common, unless the command would conflict with the first law.
3. This creature must protect itself unless doing so would conflict with the first two laws.

Using a Higher-Level Spell Slot. You animate 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.