Tunriir's Rustic Solvent

You cause rust to instantly build up around up to six machines of your choice in a 40-foot cube within range. Each target must succeed on a Charisma saving throw or be affected by this spell for the duration.

An affected target's speed is halved, and it can't use reactions. On its turn, it can use either an action or a bonus action, not both. Regardless of the machine's abilities or magic items, it can't make more than one melee or ranged attack during its turn.

A creature affected by this spell makes another Charisma saving throw at the end of each of its turns. On a successful save, the effect ends for it.