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Forcecage

Evocation
Level: 7th-level
Casting Time: 1 action
Range: 100 feet
Duration: 1 hour
Components: V, S, M
Materials: Ruby dust worth 1,500 gp.

An immobile, invisible, cube-shaped prison composed of magical force springs into existence around an area you choose within range. The prison can be a cage or a solid box, as you choose. A prison in the shape of a cage can be up to 20 feet on a side and is made from 1/2-inch diameter bars spaced 1/2 inch apart. A prison in the shape of a box can be up to 10 feet on a side, creating a solid barrier that prevents any matter from passing through it and blocking any spells cast into or out from the area. When you cast the spell, any creature that is completely inside the cage's area is trapped. Creatures only partially within the area, or those too large to fit inside the area, are pushed away from the center of the area until they are completely outside the area. A creature inside the cage can't leave it by nonmagical means. If the creature tries to use teleportation or interplanar travel to leave the cage, it must first make a charisma saving throw. On a success, the creature can use that magic to exit the cage. On a failure, the creature can't exit the cage and wastes the use of the spell or effect. The cage also extends into the Ethereal Plane, blocking ethereal travel. This spell can't be dispelled by dispel magic.

Spell Details

School: Evocation
Level: 7
Ritual: No
Concentration: No
Classes: Bard, Warlock, Wizard
S-Tier Game-changing control spell that removes threats from combat or traps enemies with no save, defining battles through positioning alone.

Player Guide

Use Forcecage to isolate dangerous single targets (dragons, liches, casters) away from allies or trap entire enemy groups if you control the battlefield layout. The cage mode allows ranged attacks through it while preventing movement, making it superior to solid box for most scenarios. Position it after enemies commit to locations, and coordinate with allies to focus fire on trapped enemies or ignore them entirely while handling remaining threats.

DM Tips

Forcecage ends encounters rather than creating interesting combat, so reserve it for climactic moments or use the intelligence/wisdom saves of boss creatures to provide counterplay. Consider that trapped enemies still benefit from cover and can ready actions, so it's containment rather than guaranteed victory.