蝴蝶刀（★） | 表面淬火 (战痕累累)

The ★ Butterfly Knife | Case Hardened is a jewel of CS:GO. Its gleaming, multi-colored design and flashy butterfly flip animations make it a fan favorite. It belongs to the Case Hardened Collection. It was first released in February 2014.

This skin is classified as 'Covert,' and it's one of the most sought-after knife skins due to its rarity. Its unique design has also contributed to its desirability.

The ★ Butterfly Knife | Case Hardened was first introduced to the CS:GO community in the Arms Deal Update of February 2014. More about the update at Arms Deal Update.

It's adored by the community for its vibrant, multi-colored design and iconic butterfly flipping animation, making it a common sight in streamer and professional matches alike.

As a skin for the Butterfly knife, it is compatible with all characters.

The Case Hardened skin is renowned for its variety of blue, gold, and rose colors which give the knife its hardened, weather-beaten aesthetic. The pattern varies from knife to knife, with some offering more blue than others.

Released during the arms deal update, you can read more on Arms Deal Update.

The skin is inspired by the real-world process of case-hardening, which involves infusing the surface of a metal with carbon to toughen it.

Designed by Valve.

The skin uses advanced texture mapping techniques to apply the multicolored case-hardened finish to the knife model.

A fan-favorite, many reviewers praise the skin for its unique look and glossy appearance as well as the satisfying flip animations.

The skin holds historical significance as being one of the original knife skins available in CS:GO.

The skin's popularity can be attributed to its uniqueness, the rarity factor, and its distinctive flipping animation.

The Arms Deal Update, which brought this skin to the game, was a significant moment in CS:GO's history, heavily influencing the in-game economy and culture. Read more at Arms Deal Update.

The ★ Butterfly Knife | Case Hardened was created with a look of a worn and well-used tool, symbolizing its lethal efficiency.

The Case Hardened design symbolizes the durability and longevity of the knife. Each color pattern is unique, symbolizing individuality.

Many players emotionally connect with the ★ Butterfly Knife | Case Hardened due to its rarity and the status associated with owning the appealing skin.

Its release inspired skin designers to experiment more with multi-colored designs and influenced player's preference towards flashy animation skins.

Due to its popularity, the ★ Butterfly Knife | Case Hardened is often seen in esports matches.

Players often recount the thrilling moment of unboxing or achieving the rare ★ Butterfly Knife | Case Hardened, making it a legendary skin within the community.