Missing sideboard cards? The full 15-card sideboard runs about $50.35.
Buy sideboard on ManapoolThis is a race against a deck with no real use for our Fog effects beyond buying time for Lorien Revealed and Behold the Multiverse to find answers, so Hydroblast and Blue Elemental Blast come in as cheap, efficient removal for Guttersnipe, Kessig Flamebreather, Voldaren Epicure, and Lightning Bolt itself. Faerie Macabre exiles Sneaky Snacker before its third-draw trigger can return it, since the opponent has no other graveyard dependency worth attacking. We trim Preordain and the card-draw-only instants that don't interact, plus two copies of Tangle since we have enough Fog effects already and need the deck slots for interaction. Keep Moment's Peace, Fog, and Weather the Storm as our core defensive plan; the games are won by surviving the burn and grinding with card advantage.
Fog effects are largely dead against a control deck with almost no combat damage plan, so we trim Tangle and Embrace the Paradox for more proactive tools. Dispel protects our key draw spells and finishers from Counterspell and Snuff Out, winning crucial tempo wars. Murmuring Mystic gives us a persistent clock and blocker that generates value every time we cast an instant or sorcery, which is relevant since our deck is full of them. Hydroblast and Blue Elemental Blast stay in the sideboard here: they only answer red spells and permanents, and Dimir Control has no red cards, so they would have no targets. Dispel and Murmuring Mystic are far more broadly useful. Keep the rest of our card draw to out-grind their Baleful Strix and Thorn of the Black Rose value engine.
Spy Combo wants to dump creatures into the graveyard for Dread Return and reanimation shenanigans with Balustrade Spy and Lotleth Giant's undergrowth trigger, so Faerie Macabre is excellent at exiling key reanimation targets or disrupting their Dread Return flashback fuel. Stream of Thought is a poor fit here since self-milling ourselves doesn't help against a deck that doesn't punish graveyard size, and we'd rather have proactive graveyard disruption. Our Fog suite remains crucial since this deck can go wide with Overgrown Battlement mana into a huge swarm, and surviving combat while we draw into Plunder the Trollshaws and Behold the Multiverse is the core gameplan. Keep the full removal-light control shell intact otherwise, since none of our sideboard anti-red or anti-blue cards have legal targets against this green-black deck.