Mitsu Snake Rain FTK

Step 1: Activate Habakiri's effect to summon and tribute Saji

Step 2: Activate Saji's effect to add Prayers

Step 3: Activate Prayers, tribute Habakiri in hand, search Murakumo special Saji from grave

Step 4: Habakiri effect search Ritual

Step 5: Activate Ritual, send Kusanagi and Night Sword Serepent from Deck to summon the Murakumo in hand.

Step 6: Chain Link 1 Kusanagi add Ritual to add to hand, Chain Link 2 special Night Sword Serpent.

Step 7: Do what you will with the Serpent and Saji. You can make a rank 4 or go full Fiendsmith combo if you want.

Step 8: Activate Ritual tribute Murakumo summon Futsu from Deck.

Step 9: Murakumo effect in grave search Mirror special Murakumo.

Step 10: Activate Mirror tribute Futsu summon Habakiri from grave.

Step 11: Futsu effect, add a Mitsurugi card from Deck (maybe a Prayers for follow-up) and then special Futsu.

Step 12: Mirror grave effect shuffle it back into deck.

Step 13: Xyz Futsu and Habakiri summon Dragluxion.

Step 14: Dragluxion effect add Tachyon Primal

Step 15: Special Tachyon Primal

Step 16: Tachyon Primal effect add Seventh Tachyon

Step 17: Activate Seventh Tachyon reveal Ragnafinity add Catapult Turtle

Step 18: Xyz Tachyon Primal and Murakumo summon Draglubion

Step 19: Tribute whatever you Summoned off Saji and Night Sword to summon Catapult Turtle

Step 20: effect Draglubion summon Numeron Dragon with whatever dragon you want from Extra Deck (maybe Number 107?) attached as material

Step 21: effect Numeron Dragon make it 17000 ATK.

Step 22: effect Cataput Turtle tribute Numeron Dragon.


Snake rain example:

Step 1: Snake rain +1 card bin Keurse, Nunu, Nauya, Saji

Step 2: Activate Nunu special summoning from gy

Step 3: Activate Keurse banishing Nunu summoning Keurse

Step 4: Keurse effect summon Nauya

Step 5: Nauya effect search Daybreak

Step 6: Daybreak tribute Keurse make 4 tokens

Step 7: Make link spider with 1 token

Step 8: Banish daybreak return Nunu send Sword Serpent

Step 9: Sword Serpent effect Special summon

Step 10: Xyz Feral Imp Sword Serpent and Nauya

Step 11: Detach search Kusanagi

Step 12: Normal Kusanagi

Step 13: Kusanagi effect search Saji

Step 14: Make proxy with spider and Imp

Step 15: Proxy make Allvain

Step 16: Saji search ritual

Step 17: Make Feral Imp

Step 18: Detach search Murakumo

Step 19: Make Cupid Pitch drop level

Step 20: Make spright sprind send Ringo

Step 21: Ritual make Murakumo send Mitama

Step 22: Mitama effect add prayers

Step 23: Prayers tribute Murakumo add Saji Special Saji

Step 24: Murakumo effect add Great purifaction Special Murakumo

Step 25: Make Trisukta Special Allvain add Corridor

Step 26: Banish Ringo make token

Step 27: Make Black-winged dragon

Step 28: Nemeses return Ringo

Step 29: Make Bystial return whatever

Do whatever you should have won by this point tbh