Ramp, clear the board, snowball to victory. Struggling with sideboard so let me know if you have any ideas. So far gone from Bronze to Silver and I've been having a blast. Prosperous Innkeeper + Scute Swarm + Felidar Retreat and Esika's Chariot + Wrenn and Seven are nice synergies. Used to play Ashaya, Soul of the Wild and Verdant Mastery but things just didn't go as planned ever. Today I've only seen monoW or something-white aggros and Doomskar is a free-win button against those since most of the white indestructible cards rotated. Have fun!

Update: Play Field of Ruin instead of Crawling Barrens against The Book of Exalted Deeds nonsense! Added Verdant Mastery for massive ramp and 2-piece feels like the right number. Removed Druid Class because it's basically just losing a card and you need all the value you can get.

Testing: Went 3-3 and 6-3 in standard events. Blood on the Snow combined with Lolth, Spider Queen and pretty much anything else is nuts and this was the combo that destroyed me every time. There was a single azorius party running Linvala, Shield of Sea Gate which countered my Doomskar plan and overwhelmed me. However, the deck feels good to play against most of the current decks I've found and is able to overwhelm other decks even without playing Doomskar (https://www.reddit.com/r/MagicArena/comments/pq8hb1/overwhelming_werewolfgruul_feels_so_gooood_turn_5/). Looking forward to trying it out more, but I'm super-happy to go positive in events with my own brew :)

Update #2: Went 3-3 today in Standard Event because I was completely stomped by Izzet Dragons which seems very popular at the moment. Scute Swarm just doesn't feel like it gives enough reward for completing its requirements and Felidar Retreat is way too slow in meta filled with flyers. Esika's Chariot and Wrenn and Seven are still very powerful and playing them feels better than playing anything else in the deck. For these reasons I have decided to abandon the landfall strategy and built a Simic Ramp deck which is still based around getting lots of lands, but the payoffs like Alrund's Epiphany and Iymrith, Desert Doom are just so much more powerful than Felidar Retreat and Scute Swarm mainly due to speed. Running Decisive Denial also feels like it gives me that little edge over others which is missing from Selesnya. The Simic works well in Silver ladder, but I am yet to try it out in a more competitive environment. Despite all of that, I still think this is a great jank deck that is fun to play, unique, but trying to refine it I feel like there just isn't enough payoff for running white outside of Felidar Retreat which is a shame. I hope the ~90 of your that exported it are having fun with it and maybe some of you figured out the secret formula to making this competitive :) Either way, breaking even in standard events with an original build is a win in my book.

I don't plan on working on this version of the deck anymore, if you wish a less janky, more competitive standard selesnya list based around lands have a look at https://mtgazone.com/deck/selesnya-landfall-by-ryoichi-284-mythic-innistrad-midnight-hunt-standard-day-2/ , unfortunately I cannot test it out as I don't have any rare wildcards left. Good luck!

Mini-update: This Selesnya looks really promising and will likely be the favourite version of this deck in the coming days: https://mtgmelee.com/Decklist/View/167708 

Link to the Simic deck I'm running now: https://aetherhub.com/Deck/mid-simic-ramp