Missing sideboard cards? The full 15-card sideboard runs about $19.29.
Buy sideboard on ManapoolMono Red Madness kills through direct damage and Guttersnipe/Kessig Flamebreather triggers rather than combat, so graveyard hate does nothing here since Fiery Temper's madness cost is triggered from exile, not the graveyard. Weather the Storm's lifegain is your best tool to survive the damage race, and Drown in Sorrow's -2/-2 kills Voldaren Epicure and Guttersnipe (both 1/1 and 2/2 respectively) to cut off two of their damage engines, though it leaves Kessig Flamebreather's 1/3 alive. Grapple with Death and Fungal Infection are too slow or too narrow against a deck that isn't attacking with big creatures, so they make way for the life-gain package.
Dimir Control leans on Counterspell and Snuff Out to protect its board and answer your threats, so Duress taken before you commit your real payoffs (Troll of Khazad-dum, Pestilence) clears the way and can strip a card like Extract a Confession or Cast Down. The extra Nihil Spellbomb is a low-cost inclusion that can exile their graveyard to deny Deep Analysis's flashback. Cast Down is a weak swap since most of their creatures (Faerie Seer, Spellstutter Sprite, Augur of Bolas) are already small enough for your Pestilence activations to handle, so proactive disruption is more valuable than more removal.
Mono-Blue Terror lives and dies on graveyard density, since Tolarian Terror and Cryptic Serpent both cost less for every instant/sorcery in the graveyard — exiling that graveyard with the extra Nihil Spellbomb resets their cost reduction and denies the payoff for all their self-mill. Duress strips Counterspell or Brainstorm before they can protect a threat, and Nausea's -1/-1 to all creatures cleanly kills a 1/1 Delver of Secrets. Fungal Infection and Grapple with Death are cut since their creature count is low and their real threats (Tolarian Terror, Cryptic Serpent) are far too big to kill with -1/-1 effects; Titan's Grave is trimmed since a tapped land is a real cost against a tempo-oriented deck.