No sideboard swaps are possible in this mirror-like matchup. Both decks share Requiting Hex, Floodpits Drowner, and Kaito, Bane of Nightmares, so the games will likely come down to card advantage from Enduring Curiosity and Spyglass Siren's Map tokens. We Say Thee Nay! is valuable to protect your own Kaito or counter their Strategic Betrayal.

This is a mirror-ish Dimir Midrange matchup, so proactive disruption is key: Duress strips their removal (Requiting Hex, Bitter Triumph) or key threats like Kaito, Bane of Nightmares before they can be deployed. Strategic Betrayal makes them exile a creature they control along with their graveyard, which keeps their board in check in a grindy matchup. We Say Thee Nay! is less impactful since both decks operate at similar speed with plenty of mana to pay through soft counters. The Wondrous Wasp's small body is outclassed in this grindy mirror, so it's cut for hand disruption that attacks their game plan directly.

No sideboard options are available for this matchup. Requiting Hex answers their cheap aggressive creatures like Callous Inspector, while Bitter Triumph is the removal that can handle bigger threats like Rottenmouth Viper. Floodpits Drowner buys tempo against their go-wide plan. Nowhere to run's -3/-3 can also handle threats like Smaug the Magnificent.