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Bill lets you draw two cards

However, these cards will occasionally have powerful effects that allow them to be played in other decks, and Deus X Krawler's effect is far too useful to overlook

C Common Fusion Substitute X SPELL (This card is always treated as "Polymerization".) Fusion Summon 1 Fusion Monster from your Extra Deck, using monsters you control as Fusion Material

(But it's much better than putting in Cyber Nova or Terranite, which I don't feel like using properly, and if I can't draw Rank-Up-Magic, I'll just use another rank 4...) (In other words, Raidraptor makes it easier for him to collect Rank-Up-Magic, and thanks to the large Raidraptor, it doesn't spoil easily even if you throw in a lot of them...) Probably just for this guy he wouldn't normally put Raidraptor Rank 4 and Rank-Up-Magic in his Deck