(2) When your opponent activates a card or effect and you control a Gem-Knight Fusion Monster (Quick Effect): You can banish 3 Gem-Knight cards from your GY, including this card
Give your deck a go against some friends or in casual duels, or even just shuffle it up and draw a practice starting hand, to see what works - and what doesnt - and then adjust as necessary
Description: 2 HERO monsters with different Attributes Must be Fusion Summoned
And just like you might expect, his Decks a mix of the Cyber Dragon and Cyberdark strategies, including cards like Cyberdark Dragon , Cyber End Dragon , and the mighty Chimeratech Overdragon
Doppelwarrior takes it further, enabling plays like: Librarian + Formula = draw 2, then Synchro during your opponent's Main Arcanite, to wall up with 2400 ATK, and pop 2 cards on the crackback Black Rose, to nuke their board at the end of their Main Phase Debris + Dandy + Doppel = 2-card Trishula Formula into Librarian Librarian Formula = Draw 5 Quasar All seems well until you realize there is a lot of hate that the deck is suceptible to, ranging from pinpoint disruption or devastating floodgates
Money is another factor, each sleeve though minimal in cost, will add up throughout use