Sideboarding strategy:

BW Aggro (ft. Knight of Malice): -2 Metallic Rebuke, -2 Battle at the Bridge, -1 Prophetic Prism, -1 Merchant's Dockhand, -1 Karn, Scion of Urza, -1 The Antiquities War, +2 Fragmentize, +2 Contraband Kingpin, +2 Golden Demise, +2 Vraska's Contempt

BW Tokens (ft. Benalish Marshal): -3 Metallic Rebuke, -1 Sorcerous Spyglass, -1 Prophetic Prism, -1 Sentinel Totem, -1 Karn, Scion of Urza, -1 The Antiquities War, +2 Fragmentize, +2 Contraband Kingpin, +2 Golden Demise, +2 Vraska's Contempt

RBx Vehicles: -1 Prophetic Prism, -1 Cogworker's Puzzleknot, -1 Karn, Scion of Urza, -1 The Antiquities War, +2 Contraband Kingpin, +2 Vraska's Contempt

UW Control: -2 Battle at the Bridge, -1 Fatal Push, -3 Navigator's Compass, -1 Servo Schematic, +2 Fragmentize, +2 Negate, +1 Sentinel Totem, +1 Merchant's Dockhand, +1 Tezzeret the Schemer

UW Historic: -2 Battle at the Bridge, -1 Fatal Push, -3 Navigator's Compass, +2 Negate, +2 Vraska's Contempt, +1 Merchant's Dockhand, +1 Tezzeret the Schemer

Mono Red Aggro: -1 Metallic Rebuke, -2 Sorcerous Spyglass, -1 Prophetic Prism, -1 Cogworker's Puzzleknot, -2 The Antiquities War, +2 Contraband Kingpin, +2 Golden Demise, +2 Vraska's Contempt, +1 Tezzeret the Schemer

Ghalta Green: -1 Sorcerous Spyglass, -1 Merchant's Dockhand, -1 Servo Schematic, -2 Herald of Anguish, +2 Bontu's Last Reckoning, +2 Vraska's Contempt, +1 Tezzeret the Schemer

GW Historic: -1 Metallic Rebuke, -1 Fatal Push, -1 Sorcerous Spyglass, -1 Merchant's Dockhand, -1 Sentinel Totem, -1 Karn, Scion of Urza, -1 The Antiquities War, +2 Fragmentize, +2 Bontu's Last Reckoning, +2 Vraska's Contempt, +1 Tezzeret the Schemer

GB Constrictor: -2 Sorcerous Spyglass, -1 Merchant's Dockhand, -1 Sentinel Totem, -1 The Antiquities War, +2 Bontu's Last Reckoning, +2 Vraska's Contempt, +1 Tezzeret the Schemer

Red GPGift: -2 Metallic Rebuke, -2 Battle at the Bridge, -1 Fatal Push, -1 Merchant's Dockhand, -1 Tezzeret the Schemer, +2 Contraband Kingpin, +2 Negate, +2 Golden Demise, +1 Sentinel Totem

Refurbish GPGift: -2 Battle at the Bridge, -1 Fatal Push, -1 Navigator's Compass, -1 Tezzeret the Schemer, +2 Negate, +2 Vraska's Contempt, +1 Sentinel Totem

Scarab God Midrange: -2 Battle at the Bridge, -1 Fatal Push, -3 Navigator's Compass, +1 Negate, +2 Vraska's Contempt, +1 Merchant's Dockhand, +1 Sentinel Totem, +1 Tezzeret the Schemer

Grixis Improvise: -2 Battle at the Bridge, -1 Fatal Push, -1 Sorcerous Spyglass, -1 Merchant's Dockhand, -1 Sentinel Totem, +2 Contraband Kingpin, +2 Golden Demise, +2 Vraska's Contempt

The Affinity Mirror: -2 Battle at the Bridge, -1 Fatal Push, -1 Sorcerous Spyglass, -3 Navigator's Compass, +1 Fragmentize, +2 Negate, +2 Vraska's Contempt, +1 Merchant's Dockhand, +1 Tezzeret the Schemer