yugioh speed duel duelists of shadows card list Best Cards in GX: My Speed Duel decks! :

He can also exile the top card of his controller's library to cast until the end of the turn, and Hidetsugu deals damage equal to the cards converted mana cost to any target

You can add a valuable Cresselia card to your collection from the Great Encounters set

It's worth noting that, besides some small card shops, official retailers won't hold single packs of special sets like Prismatic Evolutions

This is an option for that by revealing the Cubic Fusion monster, but then you cannot summon a Nova until your next turn, so it is a more targeted option that comes with a forced delay

This obviously makes it absurdly easy to create a massive army that can also be used as fodder for your sac outlets