Vorpal Sword

Major, legendary (requires attunement)

You gain a +3 bonus to attack and damage rolls made with this magic weapon. In addition, the weapon ignores resistance to slashing damage.

When you attack a creature that has at least one head with this weapon and roll a 20 on the attack roll, you cut off one of the creature’s heads. The creature dies if it can’t survive without the lost head. A creature is immune to this effect if it is immune to slashing damage, doesn’t have or need a head, has legendary actions, or the DM decides that the creature is too big for its head to be cut off with this weapon. Such a creature instead takes an extra 6d8 slashing damage from the hit.

Variants:

• Vorpal Double-Bladed Scimitar
• Vorpal Greatsword
• Vorpal Longsword
• Vorpal Scimitar

Vorpal Double-Bladed Scimitar

• Damage: 2d4 slashing
• Properties: Two-Handed, special
• Weight: 6.0 lbs.

Vorpal Greatsword

• Damage: 2d6 slashing
• Properties: Heavy, Two-Handed
• Weight: 6.0 lbs.

Vorpal Longsword

• Damage:
  • One-handed: 1d8 slashing
  • Two-handed: 1d10 slashing
• Properties: Versatile
• Weight: 3.0 lbs.

Vorpal Scimitar

• Damage: 1d6 slashing
• Properties: Finesse, Light
• Weight: 3.0 lbs.

Source: Dungeon Master’s Guide p. 209. Available in the SRD