Banishment

You employ sheer force of will to make reality question the existence of a nearby creature, causing them to warp visibly in front of you. Until the spell ends, a target native to your current plane is

Level
4
School
Abjuration
Casting time
1 action
Range
60 feet
Components
V, S, M
Duration
Up to 1d4+2 round
Classes
Cleric, Herald, Sorcerer, Warlock, Wizard
Concentration
Yes

You employ sheer force of will to make reality question the existence of a nearby creature, causing them to warp visibly in front of you.

Until the spell ends, a target native to your current plane is banished to a harmless demiplane and incapacitated. At the end of the duration the target reappears in the space it left (or the nearest unoccupied space). A target native to a different plane is instead banished to its native plane.

At the end of each of its turns, a banished creature can repeat the saving throw with a -1 penalty for each round it has spent banished, returning on a success. If the spell ends before its maximum duration, the target reappears in the space it left (or the nearest unoccupied space) but otherwise a target native to a different plane doesn't return.

At Higher Levels. The duration of banishment increases by 1 round for each slot level above 4th.

Source and licence

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

Licence: SRD (CC BY 4.0).

Every licence notice Tavern Bag relies on.