Curse of Lead

Target a point within range. Up to two creatures of your choice within a 10 foot cube have their mundane metal weapons magically become unwieldy and awkward to swing with, and their mundane metal armor becomes heavy and cumbersome.

A creature holding a metal weapon must make a Strength saving throw at the start of each of their turns. On a failure, they have disadvantage on attacks made with that weapon (or weapons). On a success, they are unaffected this turn.
A creature wearing metal armor must make a Strength saving throw at the start of each of their turns. On a failure, the target drops prone.
These saves can be rolled as one saving throw, if a creature has both metal armor and weapons.

Magical equipment is unaffected by this spell.

At Higher Levels. When you cast this spell using a 3rd level or higher spell slot, the size of the cube increases by 5 feet, and the number of creatures you can affect increases by 1 for each spell slot above 2nd level.