Eldritch Cube

A black, nonreflective, incorporeal 10-foot cube appears in an unoccupied space that you can see. Its space can be in midair if you so desire. When a creature starts its turn in the cube or enters the

Level
5
School
Conjuration
Casting time
1 action
Range
120 feet
Components
V, S
Duration
Up to 1 minute
Classes
Artificer, Warlock, Wizard
Concentration
Yes

A black, nonreflective, incorporeal 10-foot cube appears in an unoccupied space that you can see. Its space can be in midair if you so desire. When a creature starts its turn in the cube or enters the cube for the first time on its turn it must make an Intelligence saving throw, taking 5d6 psychic damage on a failed save, or half damage on a success.

As a bonus action, you can move the cube up to 10 feet in any direction to a space you can see. The cube cannot be made to pass through other creatures in this way.

Source and licence

From Level Up: Advanced 5e (A5E SRD).

Licence: SRD (CC BY 4.0).

Every licence notice Tavern Bag relies on.