Mono Blue Affinity

https://scryfall.com/@yoman5/decks/fa16148e-d8eb-44ee-91a4-11596da48206

4 Steel Overseer
4 Chamber Sentry
4 Shambling Suit
4 Renowned Weaponsmith
4 Emry, Lurker of the Loch
4 Stonecoil Serpent
4 Gingerbrute
2 Crashing Drawbridge
3 Manifold Key
2 Castle Vantress
4 Mystic Forge
12 Island
3 Vantress Gargoyle
4 Mobilized District
2 Karn's Bastion

// Sideboard