Reshape Skeleton

4th-Level Necromancy

Casting Time: 1 action
Range: 60 feet
Components: V, S, M (a pinch of powdered giant bone)
Duration: Concentration, up to 1 minute

You cause one creature you can see to suffer a bone-cracking rearrangement of its skeleton. Choose one creature you can see within range that has a bony or cartilaginous skeletal structure. That creature must make a Constitution saving throw or its bone structure becomes mutable for the duration.

Until the spell ends, you can use a bonus action on each of your subsequent turns to adjust the target’s bone structure, limiting its ability to act. The target must succeed on a Constitution saving throw or take 3d10 bludgeoning damage and suffer one of the following effects of your choice until the end of its next turn: halved speed or disadvantage on attack rolls.

At the end of each of its turns, the target can make another Constitution saving throw. On a success, the spell ends on the target.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d10 for every two slot levels above 4th.