So Reptiles. They used to be one of the most undersupported types in Rush along with Aqua, Beast-Warrior, Rock and Zombie. Now, however, they have a fully coherent playstyle based on milling lots of cards and paying a lot of LP. The deck's 2 main bosses, Gunleon and Caliguleon, capitalize on the deck's strengths. Gunleon, when at 1000 LP or lower, can increase its ATK by the difference in LP by milling 5 and Caliguleon can grow even bigger by gaining 100 ATK for each card in grave, hence why you run more than 40 cards. Rocketortoise is here for generic attack boosts and field clearance if necessary. Excavation can be afforded to play at 3 thanks to Mantisleon adding back discard fodder. With that said, I'm Valtryopia and I hope you enjoy this list.
P.S Play Aegis since Mirror Force is rapidly rising in usage in the current meta.
P.P.S Someone had to make this list