You'll want to get out Rexterm as quickly as you can. Therefore we are running
17 cards that can help us bring him out. Because Ash is a major threat, we opt for Solemn Strike rather than Judgment, as it can ensure the Summon going through, even if halving our LP is generally a good thing. Since we won't do any Special Summoning during our turn, we choose Pot of Duality to aid us in finding something useful off the top, e.g. Strike or Fossil Dig/Misc. You could also use Prosperity, but since I don't want to spend over 300 bucks on a playset, Duality will do just as fine.
60
30
600
990
