Mind Blade

Rare (requires attunement by a specific individual)

Mind flayers can turn any nonmagical sword into a mind blade. Only one creature can attune to it: either a specific mind flayer or one of its thralls. In the hands of any other creature, the mind blade functions as a normal sword of its kind. In the hands of its intended wielder, the mind blade is a magic weapon that deals an extra 2d6 psychic damage to any target it hits.

Variants:

Mind Blade Double-Bladed Scimitar

Mind Blade Greatsword

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

Mind Blade Longsword

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

Mind Blade Rapier

  • Damage: 1d8 piercing
  • Properties: Finesse
  • Weight: 2.0 lbs.

Mind Blade Scimitar

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

Mind Blade Shortsword

  • Damage: 1d6 piercing
  • Properties: Finesse, Light
  • Weight: 2.0 lbs.

Source: Volo’s Guide to Monsters p. 81