Draw-go deck I used to get to Masters. Just came back to the game after a year+ away, so I had a long slog with this slow grinder (apologies to the people with janky grenadin decks I pubstomped at the bottom of bronze). Pretty much just stall the board until you can slam
Omniscience down as fast as you can, hopefully you have aegis up when you do.
It's about as good of a control deck as you'll find in the format right now.
Lystia, Flighty Mistral is a nightmare for aggro and relic weapon decks to deal with, plus it helps hit your sigil drops. Omniscience is a meta-warping, busted card that's power creep at it's finest, but I love it, so whatever I guess.
The market is used to get self-aegis at instant speed with
Mistveil Drake, fetch a matchup-specific wincon, or absolutely ruin someone's life by playing
Vision of Austerity on key pieces to their strategy.
Check-Raise,
Defiance, and
Unseal are all flex. If you're seeing more aggro, add Defiance. If you're running into lots of
Jarrall Ascending or
Kira Ascending, Check-Raise is your friend. Unseal is there for the control matchups.
For the most part, you want to hold up power and play on your opponent's turn: either kill something, draw cards, or both. Play
Stormhalt Plating to win once you have board advantage, but if you have to use it for removal or power, you can always just fetch one of the other wincons out of the market.
Super rude deck, don't play it if you want friends. Games can take forever.