Longsword of Sharpness

When you attack an object with this magic weapon and hit, maximize your weapon damage dice against the target.

When you attack a creature with this weapon and roll a 20 on the d20 for the attack roll, that target takes an extra 14 Slashing damage and gains 1 Exhaustion level.

Sap (Mastery): If you hit a creature with this weapon, that creature has Disadvantage on its next attack roll before the start of your next turn.

Versatile: A Versatile weapon can be used with one or two hands. A damage value in parentheses appears with the property. The weapon deals that damage when used with two hands to make a melee attack.

Proficiency: martial, longsword Source: Dungeon Master's Guide (2024) p. 314