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Factory is not as easy to use as Polymerization or Frightfur Fusion, but its a Polymerization that can be searched with Edge Imp Chain

The catch is that theyre all tribal-themed decks, so youll have trouble finding a place for them in your usual decks

In this mode, youll be competing against different opponents worldwide

Also, it's not used nearly as much anymore simply because cards that could remove things in the Spell/Trap zone at the end of your turn, if you go second, are more prevalent nowadays (Cosmic Cyclone, Twin Twisters, Mystical Space Typhoon, etc)

White Card Draw Engines Even the meekest among us love card draw

Lastly, Endurance can be found via Once Upon a Time which can come in handy when up against fast combo decks