HomeEquipmentUnique or Special Purpose toolse Whetstone Whetstone By No machine-readable author provided. RJFJR assumed (based on copyright claims). – No machine-readable source provided. Own work assumed (based on copyright claims)., Public Domain, https://commons.wikimedia.org/w/index.php?curid=374996 Source Adventurer’s Armory Honing a blade with a whetstone requires about 15 minutes of work and grants the weapon a +1 bonus on your damage roll the first time you hit with it. This only works on nonmagical blades.