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 out there where a magic dagger can be found and used until the Player, be it Alucard or what have you, is out of mana.