Dredge the Dead

You use foul magic to dredge up a corpse, skeleton, or dismembered body part to fill it with necromantic life, and will the dead to fight at your command for a brief time. Choose a pile of bones, corpse, or dismembered body part of a Small or Medium creature within range. The target becomes a skeletal minion if you chose bones, a zombie if you chose a corpse, or an animated body part (such as a crawling claw) if you chose a dismembered body part. The summoned undead must be a challenge rating of 1/4 or lower, and the type of undead that is summoned is determined by the DM.

On each of your turns, you can use a bonus action to mentally command the creature you made with this spell if the creature is within 60 feet of you. You decide what action the creature will take and where it will move during its next turn, or you can issue a general command, such as to guard a particular chamber or corridor. If you issue no commands, the creature only defends itself against hostile creatures. Once given an order, the creature continues to follow it until its task is complete.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the maximum challenge rating of the undead you can summon with this spell increases by 1 category for every slot level above 1st. For example, if cast this spell at 2nd level, the maximum challenge rating of the undead you can summon increases to CR 1/2, to CR 1 at 3rd level, CR 2 at 4th level, CR 3 at 5th level, and so on.