There are other Subterror monster other than Guru, Umastryx, Nemesis Archer and Fiendess. So I thought I will try tweaking the list a bit to fit Ultramafus while still making it consistent.
This list was meant to downgrade Guru control from tier 2.5 to tier 3 in hopes of getting fun and not being called a meta *** by summoning Ultramafus turn 3 and aprove dominance by making Ultramafus 3.5-5k atk and OTK your opponent turn 3 or 5 ...
This deck is a go first deck and your God hand and go first tactic is basically Guru control and then turn 3 try swinging for big damage or control even moar.
These are the important cards you want to always see are Hidden City, Fiendess, Guru, Called/Ash/Imperm, and Final Battle/Trap Trick.
These are the cards you don't want to see when going first is Nemesis Archer.
If you go first but see no Guru or Hidden City but have Fiendess, Ultramafus or Umastryx, and Final Battle or Trap Trick do the following play:
Norma Summon Fiendess, Fiendess eff, Ultramafus or Umastryx, set Final Battle. If you have Called and Imperm set it, it is better than doing nothing.
You could also replace Necrovalley for Mystic Mine but to me it is riskier to play Mystic Mine because you have a limited options than to play against an opponent who plays Gravekeeper's.
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