A special shoutout to my friend
Broboaticus for whipping up a sideboard guide tuned to the current meta. He's done a pretty good job nailing the gameplan for each matchup so I'll include his guide in it's entirety.
Against UWx Approach: Out:
2 Cast Out1 Settle the Wreckage1 Thaumatic Compass3 Fumigate In: 4 Negate2 Lost Legacy1 Commit // MemoryIn this match up, the addition of negates is obviously huge. Youll likely force your opponent to keep in medium cards to deal with your zombies, otherwise they do present a threat, especially with shefet dunes, and sometimes you can just get there on the back of those zombo beats. Commit//Memory should be strong just due to the potential for the game to go long, its the exact reason why wildest dreams is good. I dont think trimming all of your removal is correct, so I left in the 2 cast outs.
Against RR: Out: 1 Wildest Dreams1 Pull from tomorrow3 Search for Azcanta1 Thaumatic Compass In: 2 Deserts Hold1 Settle the Wreckage3 Authority of the ConsulsI have found, against me, that search is pretty slow. Its very good, obviously, but you want actual answers rather than something that finds you answers. By adding in 3 consuls in their place, you dramatically increase your odds of survival. The additional hard removal in the form of deserts hold and settle the wreckage is fairly self explanatory.
Against Esper & Abzan Tokens: Out: 3 Thaumatic Compass1 Approach In: 2 Negate1 Ixalans Binding1 Commit// MemoryThese games have the potential to go extremely long. Having an early negate against either a hidden stockpile or an anointed procession is really huge. Ixalans Binding can deal with problem permanents, most specifically procession and stockpile. Commit deals with it on board and removes their embalm threats from the grave. In esper, I may consider trimming a ramp spell or two for the third and fourth negates, because they will bring in their own.
Against UBx Control: Out:3 Fumigate1 Settle the Wreckage In: 4 NegateThis will be a slog, as they literally just need to wait for you to cast things and then react. I suppose, like v. UW, the zombies will help, but its going to be a pretty slow game overall. Just play it carefully and run them out of threats.
Against Temur: Out: 2 Thaumatic Compass In: 1 Settle the Wreckage1 SolemnityNothing Id really change much here. You may find you want some negates for Chandra, but cast out should be fine. The primary thing to be aware of post sideboarding is that they will bring in negates and potentially spell pierces - definitely be cautious.
