Alien

The new support for Aliens is nuts. It gives more consistency for distributing A-Counters and it solves the main problem the deck initially had involving cards like Alien Ammonite and Alien Mars. If there were better reptile starters in the game, then this deck would be a solid casual deck. I mean at this point it already is but you don't always open a hand that immediately does something. This deck aims to go second, but there are cards in the archetype that makes going first a good choice also.

Alien Mother is a solid choice going second. She steals anything she destroys which means you have free link material for things like Knightmare Unicorn and Underworld Goddess. Alien Overlord is another solid card going second due to how easily it can spread A-Counters, but you might want to side 1 out going first if you don't see yourself able to make explosive link plays. 3 Nihil for grave set-up and it can search Snake Lily. 1 Alien Telepath since its a good form of Spell/Trap removal for the deck. 3 Alien Buster which gives more removal and A-Counters. 3 Alien Kid since he fuels Ze'loor. 1 Alien Mars for continuous effects I guess. 3 Alien Dog which is an extender and more A-Counters. 3 Ammonite which gets you to Gol'gar or M-Frame. 1 Yamoimori which is simply a way to pop M-Frame and set-up for Echidna.

Spell and Traps are simple. 3 Code A Ancient Ruins since its a source of A-Counters and it can be looped due to being a soft opt with multiple Gol'gar which gives more link material. 3 "A" Cell Recombination Device for consistency and A-Counters and grave set-up. 3 Mysterious Triangle for removal and extension. 3 Snake Lily as grave set-up and extension. 1 Snake Rain which could realistically be replaced with something like Monster Reborn or even Reptilianne Lamia if you're that kind of person. 2 Droplet. 3 Prosperity. 1 Mass Hypnosis which is Mind Control for 3.

Extra Deck. 1 Zeus. 2 King of the Feral Imps. 2 Gol'gar which is removal and he can loop Ancient Ruins. 1 Underworld Goddess. 1 Knightmare Unicorn. 1 I:P Masquerena. 2 Ze'loor which is Bagooska, a searcher, and an additional normal summon for Ammonite. 2 Alien Shocktrooper M-Frame. 1 Reptilianne Echidna as something to link into and for maybe 1 or 2 searches. 1 Clara & Rushka if you desperately need to link off 1 normal summon.

Side Deck. 2 Nibiru. 3 Phantazmay which is back in the format due to Dragon Link and Prank-Kid. 2 Dark Ruler. 3 "A" Cell Scatter Burst. It is not your best option for A-Counters, but it does set-up things like Mass Hypnosis. 3 Planet Pollutant Virus which is interruption and free A-Counters. 2 Mass Hypnosis to side in going first.