Magic Dagger

Magic Dagger is a golden dagger dropped by Mimics. It is a magic weapon that can be thrown as many times as the user wishes (until out of mana) without having to worry about running out. Daggers thrown have a creamy yellowish glow, and follow the same physics as regular Throwing Knives.

Trivia
It may be a reference to the many Castlevania games, where a magic dagger can be found and used until the player is out of hearts.

It may also be a reference to the Percy Jackson series, where Percy's blade always returns to his pocket.