The ★ Butterfly Knife | Ultraviolet is a Covert knife skin in Counter-Strike 2, available since March 2017 from the Spectrum Case.

The float range for this finish is restricted to 0.06–0.80, so Factory New, Minimal Wear, Field-Tested, Well-Worn, and Battle-Scarred are the only obtainable conditions on the open market. The restricted range is set by Valve at the time of release.

A StatTrak™ version is available, which tracks confirmed kills made while the skin is equipped and typically commands a premium over the standard finish. Active listings for ★ Butterfly Knife | Ultraviolet are tracked across 18 marketplaces, with prices spanning $501.99 to $5,800 depending on wear, variant, and seller.