“Mono-Blue Terror is a tempo-combo hybrid that uses cheap self-mill spells (Thought Scour, Mental Note) to rapidly fill the graveyard, enabling Tolarian Terror and Cryptic Serpent to hit the board as massive threats for very little mana. The deck pairs these threats with a permission suite headlined by Counterspell and Force Spike to protect its board and disrupt the opponent while Delver of Secrets provides an additional early clock. The engine lives and dies on graveyard density, so the mill-cantrip package and the cost-reduction threats are inseparable and must be preserved at all costs.”
Missing sideboard cards? The full 15-card sideboard runs about $49.93.
Buy sideboard on ManapoolThis is a race where cheap interaction matters far more than card advantage. Gut Shot kills Voldaren Epicure for free, disrupting their damage engine before it starts. Hydroblast destroys any red permanent (Kessig Flamebreather, Guttersnipe) or counters a red spell like Fiery Temper on the spot, while Steel Sabotage answers their Blood tokens or bounces a problematic artifact. Deem Inferior and Sleep of the Dead are too slow against a deck trying to burn you out quickly, so they come out in favor of proactive, cheap disruption. Note: Spell Pierce is being cut here since it's listed in the sideboard section as a swap target, not truly needed against a deck with few must-counter spells beyond Fiery Temper.
This mirror match comes down to who assembles graveyard density and counterspell coverage first, so protecting your own Tolarian Terror and Cryptic Serpent is paramount. Annul is mostly dead here since neither list runs artifacts or enchantments worth countering, but Steel Sabotage can bounce or counter any Blood/Clue-adjacent artifacts if they appear from sideboarding. The main plan is simply trimming the weakest cards (Deem Inferior's discount doesn't reliably fire, Sleep of the Dead is too slow) for nothing dramatic, since your sideboard has few direct answers to their identical core. Keep every copy of Counterspell, Dispel, and your card selection spells since this matchup is a battle of resolving threats and countering theirs.
Tron's game plan revolves around artifact mana rocks and setup pieces like Expedition Map, Bonder's Ornament, Giant's Boulder, and Barrels of Blasting Jelly, all of which Annul and Steel Sabotage can counter outright to slow down their assembly. Blue Elemental Blast and Hydroblast stay in the sideboard since Tron's mainboard has no red spells or permanents for them to hit. Dispel is less reliable since Tron's key pieces are sorcery-speed artifacts and creatures rather than instants, so it comes out in favor of proactive artifact hate. Keep countering with Counterspell on their bigger threats like Bramble Wurm and Nyxborn Hydra, and use Lorien Revealed to keep digging toward answers before they assemble the full Tron land base.