Gauntlet

A Gauntlet is a series of secondary Decks made by players, that aren't often used as their usual Deck, but for practicising against.

Gauntlets are often only used by skilled players. They tend to include decktypes that are currently big or the player feels they must watch out for. People are known to have kept netdecked copies of other players decks from particular tournaments in their Gauntlet.