Fun deck I made after messing around with reptile archetypes for a while. Doesn't have a whole ton of interaction, but is capable of some interesting plays.
Ideal opening hand would contain Snake Rain and either Water Lily or Ramifications plus any reptile other than Night Sword Serpent or Alien Kid (The combined discard effects of Nauya and Nunu can achieve results similar to Snake Rain). Opening move looks something like this:
1) Activate Snake Rain, discarding a reptile in your hand for cost. Mill Nauya, Nunu, Keurse, and Coatl (If one of these were already in the hand, discard it for cost and mill Aleirtt).
2) Activate Water Lily, mill Night Sword and revive Coatl. Summon Night Sword with its own effect.
3) Tribute Night Sword to revive Keurse. Use Keurse's effect to revive Nauya. Use Nauya to search for Daybreak. Revive Nunu with its own effect.
4) Overlay Nauya and Nunu for King of Feral Imps. Detach Nunu to search for Tsuchinoko.
5) Activate Daybreak, tribute Keurse and summon three tokens. Link two of them into Shocktrooper.
6) Activate Shocktrooper, discarding Tsuchinoko for cost. Place 3 A counters on Feral Imps. Summon Tsuchinoko with its effect.
7) Link Shocktrooper with the remaining token into Zer'oll. Use Zer'oll's effect to search for Alien Kid, then Use Zer'oll's effect to remove 2 counters from Feral Imps to immediately summon Kid.
8) Synchro Coatl and Tsuchinoko into Dawn Dragster.
The endboard includes the combined effects of Kid and Zer'oll to place a counter on any monster your opponent special summons, forcing them into defense mode and negating their effects. Dragster offers protection from Evenly and Imperm.
Potential board breakers include Kaijus (obviously) and normal summoned monsters that can run over Kid. If your opening hand was really good, you could potentially have a revived Shocktrooper on your field and another reptile in your hand to protect Kid from attacks.
Draglubion and Arc Rebellion are big game finishers for when you find an opening, or a fallback plan if your reptiles run out of juice.