Mainboard (60)
Creatures (16)
Instants (8)
Sorceries (4)
Artifacts (23)
Enchantments (4)
Lands (5)
Dimir Tempo is a disruption-heavy deck that attacks on multiple axes: Thoughtseize strips your key pieces, Wasteland cuts off Ancient Tomb and Seat of the Synod, and Orcish Bowmasters punishes Thoughtcast and Urza's Bauble draws. Your gameplan is to go wide with artifacts quickly so that individual disruption spells run out of gas — a resolved Kappa Cannoneer or Urza's Saga token threat is very hard for them to answer. Force of Negation comes in to protect your key threats through their counterspell suite, while Dismember handles Nethergoyf, Murktide Regent, and Tamiyo before she accumulates lore counters. Sink into Stupor is trimmed because the tempo loss of bouncing a land is less impactful than their stack interaction and creature threats in this matchup.
Oops! All Spells is a glass cannon combo deck that wins on turn one or two by milling its entire library with Balustrade Spy or Undercity Informer and reanimating Thassa's Oracle. Your primary defense is disrupting their graveyard before they can execute the combo — Faerie Macabre and Tormod's Crypt provide free or near-free hate that is difficult for them to answer through Pact of Negation. Force of Negation comes in as additional free countermagic to stop the Dread Return or Oracle trigger, augmenting your existing Force of Will suite. Cut the equipment and slow value pieces like Krang and Skateboard since this race is decided on the first couple of turns, not in a prolonged midgame. Be aware that their sideboard Leyline of the Void is a mirror-breaker against graveyard decks but does not impact your strategy — focus on being faster or holding up free interaction.
Sneak and Show is a combo deck that wins by cheating Emrakul, the Aeons Torn or Atraxa, Grand Unifier into play via Show and Tell or Sneak Attack, so your entire game plan is to counter those key spells before they resolve. Bring in all four Consign to Memory and three Force of Negation to maximize your counterspell density — Force of Negation is particularly potent here since it can stop Show and Tell or Sneak Attack for free on their turn. Sink into Stupor comes out because bouncing a land is far too slow against a deck that can win on turn one or two, and the equipment package (Shadowspear, Skateboard) and Pithing Needle are too low-impact to justify the slots. Keep your artifact engine and draw spells intact so you can develop your board and deploy Kappa Cannoneer or Krang as a fast clock after you've disrupted their combo, forcing them to fight through both your threats and your counterspells.