Notes & Combos

I will explain a few notable steps shortly.

You basically try to get Nauya in your hand or both Keurse and Nauya into the grave. You can do that either with King of Feral Imps, with Snake rain or sometimes water lilly.

The general combo expecting you have Nauya and any other monster in hand (for example Nunu that summons itself from grave for free or sakitama would be the best since it will be added back after tributing).

Activate Nauya -> Mill Keurse

Summon any monster

Activate Keurse in the Graveyard and special it, then special Nauya

Nauya searches Daybreak

Activate Daybreak and tribute Keurse to summon 4 tokens

Link 2 tokens away for Spright Elf and the other 2 for spright Sprind (Summon Elf on the right EMZ and sommun Sprind below the left arrow)

Activate Sprind and mill Iblee

(Do not activate Nephilabyss in grave yet, do it AFTER you have summoned iblle to the opponents field sinc eit locks you into reptiles)

Activate Spright Elf and summon Iblee

Link away Iblee and Nauya into Echidna below the right Link Arrow.

Activate Iblee and summon her on opp. field.

Activate Echidna to search Black Mamba

Summon Black Mamba and Mill either Alien Stealthbuster, Night Sword Serpent or Ogdoabyss (Usually you mill Stealthbuster to safe a card from hand and put tokens for free without Alien Shocktroopers effect)

Then activate Nephilabyss in the grave to summon it on the the side of the field.

Summon anything and link away 2 monsters for Alien Shocktrooper and then summon anything with Nephilabyss (Usually Ogdoabyss to have a board wipe ready if something goes wrong and keep it on field).

Then Link away Nephilabyss and the echigna for Cosmic Slicer Zeroll.

Activate Zeroll and add planet polluting virus.

Set it and pass turn.

As soon as the opponent summons a monster, activate the virus to bait a normal summon and stop him from linking away iblee.

Iblee won't be destroied since it has counters form stealthbuster or Shocktrooper from before.

Then the opponent is Iblee locked and Zeroll locked (like one sided bagooska for opponent and even linkmonsters in attack can't activate)

You also have the board wipe available with Ogdoabyss.

In turn 3 your optimal play is to summon Accesscode with Sprind and Shocktrooper that has been reborned with Elf.