No one knows where the steel caterpillar comes from, but some believe it might have extraterrestrial origin, having had hitched a ride on an asteroid that crash landed on Earth..
One year, nine months, and twenty eight days into its life, the steel caterpillar forms a cocoon sheath around itself and lays dormant until found.
When removed from its sheath and flipped open, the butterfly knife senses your intention, and decides whether it will let you momentarily wield it,attack you,or simply fly away.
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