Dark World Archives

During your Main Phase: You can discard 1 "Dark World" monster, and if you do, all "Dark World" monsters you currently control gain ATK equal to the discarded monster's Level x 100 until the end of this turn. If your monster(s) whose original Type is Fiend is discarded by the effect of a "Dark World" card or an opponent's card (even during the Damage Step): You can discard 1 card, then draw 2 cards. You can only use each effect of "Dark World Archives" once per turn.