The black sword in Roblox is most likely the Black and White Sword , a limited gear item in the marketplace published by Roblox on December 29, 2014, and originally sold for 1,000 Robux.

Closest match

  • Black and White Sword : a limited unique gear item.
  • It was part of the Roblox marketplace and could be resold by owners.

Other possible “black sword” items

  • Sword of Darkness is another black-themed Roblox gear item, but it is a different item.
  • Black Hole Sword is also listed as a Roblox gear item, so the phrase could refer to that instead depending on what you saw.

What to check

If you mean a specific sword from an avatar, game, or catalog screenshot, the exact name may differ because several Roblox items use black sword-style designs. The fastest way to identify it is usually by the item name shown in the catalog or by its gear ID.

TL;DR: Most likely Black and White Sword , but Sword of Darkness and Black Hole Sword are also plausible matches depending on the item you saw.