Mainboard (60)
Creatures (1)
Instants (4)
Sorceries (8)
Artifacts (9)
Enchantments (9)
Dimir Tempo wins by disrupting your mana development with Wasteland and Thoughtseize while presenting fast threats like Tamiyo, Inquisitive Student and Orcish Bowmasters that generate card advantage if unanswered. Your primary plan is to resolve Dark Depths plus Thespian's Stage as quickly as possible, since a 20/20 indestructible token is nearly impossible for them to answer — Kaito and Orcish Bowmasters cannot block it and they have no removal for it main. Dismember gives you a way to kill Tamiyo before she flips and handles Murktide Regent and Nethergoyf, preventing them from stabilizing the board long enough for you to combo. Force of Vigor comes in as free disruption against their sideboard — primarily to destroy Surgical Extraction targets or Toxic Deluge setups — and can be pitched to Force of Will analogues in a pinch since you have green cards in hand. Keep Tabernacle in as it is excellent against their creature-heavy post-board configuration, and prioritize using Crop Rotation to find Dark Depths or answer their Wastelands by fetching Yavimaya.
Oops! All Spells is a pure combo deck that wins by milling its entire library with Balustrade Spy or Undercity Informer and reanimating a Thassa's Oracle; your primary defense is Leyline of the Void in your opening hand, which exiles their graveyard as cards hit it and completely dismantles the combo. Mindbreak Trap provides free disruption against the ritual-heavy storm sequences and is castable even through Pact of Negation. Because they are entirely non-interactive in game one and have no way to beat a resolved Leyline without their Force of Vigor sideboard, you should mulligan aggressively for Leyline in games two and three. The cards coming out are situational utility lands and single-piece interaction with low impact against a deck running zero permanents that matter to Disruptor Flute or Pithing Needle. Your Dark Depths plan remains live as a fast clock to pressure them before they can cycle through their deck.
Sneak and Show is trying to resolve Show and Tell or Sneak Attack and put Emrakul or Atraxa into play as early as turn one or two, so your primary goal is disrupting that combo before it resolves. Mindbreak Trap is your most powerful answer, exiling spells cast without paying mana costs — it hits both Show and Tell and Sneak Attack for free if they go off quickly. The two additional Disruptor Flute copies (naming Show and Tell or Sneak Attack) give you a persistent lock that is difficult for a mostly blue deck to answer outside of their own Disruptor Flute or Brainstorm chains. Tabernacle at Pendrell Vale is essentially dead in this matchup since Emrakul and Atraxa ignore upkeep costs, while Ghost Quarter and Pithing Needle are low-impact cards that don't address the combo. Your Marit Lage plan via Dark Depths and Thespian's Stage remains a viable clock, and Karakas can bounce their Emrakul if it somehow enters play under their control.