Enlarge Weapon

You double the size of a weapon that is being held by a creature (which may include yourself). The weapon adds 1d6 to its damage rolls and gains the Heavy and Two-Handed properties for the spell's duration. If that weapon is already heavy, it can only be held by a creature with a STR of 20 or higher for the duration of the spell.

If cast on a weapon being wielded by an unwilling creature, that creature must succeed on a DEX save or be forced to drop their weapon (unless they have a strength of 20 or higher). On a success, they are able to resist the spell.