This is the list I took from Diamond 1 to Masters, 11-3 to get there I believe. I havent played in about a year, so this was a nice journey. I started in Bronze with Isomorphic's Unstable Feln, which cut like butter through Gold. Once I hit diamond, I switched to Asmoday1232's May Feln Control. Took that thru D3 and 2. At D1, I modified to the above deck list after going up to 1 win from masters and back down i think twice, tweaking, learning and adjusting along the way.
The sideboard includes meta considerations for your Market and Blightmoth for when needed. If I were to see more aggro, x/1s, and/or tokens than I have in D1 and so far in Masters, I would put 3x Blightmoth in the list in exchange for:
-1 Defile
-1 Vara
-1 Hailstorm
A few notable comments:
Between Marionette, Eremot, and Nullblade, you can put a lot of pressure on decks without much relic removal.
At least half of my matches were won on the back of aggressively using Rain of Frogs on turn 4.
Combined with Turn to Seed and In Cold Blood, Rain of Frogs can nullify surprisingly large portions of an opposing game plan/fill their deck with air.
Vara can be cut if you're seeing less Hooru aegis-based control, that matchup can be difficult.