Unseen Blade in Elden Ring makes your right-hand weapon completely invisible when cast, which is mostly useful for PvP mind games and ambushes.

What it does

  • Hides the weapon in your right hand.
  • Can be cast while moving.
  • Does not make the weapon stronger; it only changes visibility.

Practical use

  • Best for PvP, since opponents can’t easily tell what weapon you’re using.
  • It can help you fake being unarmed or make an opening attack harder to read.

Limits

  • It only affects the right-hand armament.
  • It won’t work on every weapon, and other weapon buffs can remove its effect.

Basic requirement

  • Game guides list it as a sorcery that needs Intelligence to use, with common references giving 12 Intelligence as the requirement.

If you want, I can also tell you where to find Unseen Blade in the game.