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.
Sneak and Show is a combo deck that aims to cheat Emrakul or Atraxa into play via Sneak Attack or Show and Tell as early as turn one, so your primary goal is to slow them down with Wasteland on their blue sources and win with a Marit Lage token before they can combo off. Mindbreak Trap is your best interaction — it exiles spells cast in a chain for free when they try to go off through Force of Will, and they cannot counter it with Force of Will since it exiles rather than counters. Force of Vigor comes in to destroy their Sneak Attack, Lotus Petals, or any artifact/enchantment pieces at instant speed for free, acting as a disruption tool rather than a silver bullet. Keep Urza's Saga and Mox Diamond online to ensure fast Marit Lage assembly; the removed cards offer minimal value in a race against their one-card combo kills. Prioritize Wastelands on Volcanic Island and City of Traitors to tax their mana and make it harder to hold up Force of Will while comboing.
Oops, All Spells! is a pure combo deck that wins by milling itself with Balustrade Spy or Undercity Informer and reanimating Thassa's Oracle or using Dread Return to set up a win through the graveyard. Leyline of the Void is your premier weapon here — a turn-zero Leyline shuts off the entire engine since Narcomoeba won't trigger, Bridge from Below won't make tokens, and Dread Return loses its flashback fodder. Mindbreak Trap answers their Pact of Negation blowouts if you're trying to interact on the stack. Disruptor Flute, Pithing Needle, Ghost Quarter, Ancient Tomb, Skateboard, and Icetill Explorer come out as they contribute nothing to stopping a turn-one or two kill. Your primary game plan is to get a Marit Lage token into play as quickly as possible, since a 20/20 indestructible threat demands an answer they don't have, while your Leylines keep their graveyard interactions offline.