We did see a mechanic that I feel is underappreciated: Disturb
There is a chance that Ultima is too slow against Prowess, but if control decks can construct themselves to routinely survive until turn five, Ultima blows them out
These three cards all control your opponents tapping/untapping so they already have mechanic synergy
From this perspective, you should buy every Secret Lair drop, whether you actually want it or not, knowing that you'll basically break even most of the time, while not-that-infrequently, you'll hit an above-average drop and double your money

1 Mirko, Obsessive Theorist 1 Marvo, Deep Operative 1 Case of the Shifting Visage 1 Copy Catchers 1 Final-Word Phantom 1 Watcher of Hours 1 Charnel Serenade 1 Eye of Duskmantle 1 Foreboding Steamboat 1 Unshakable Tail 1 Counterpoint 1 Ransom Note (Surveil) 1 Amphin Mutineer 1 Dream Eater 1 Mission Briefing 1 Phyrexian Metamorph 1 Sphinx of the Second Sun 1 Vizier of Many Faces 1 Black Sun's Zenith 1 Dogged Detective 1 Doom Whisperer 1 Grave Titan 1 Massacre Wurm 1 Overseer of the Damned 1 Phyrexian Arena 1 Pile On 1 Reanimate 1 Rise of the Dark Realms 1 Toxic Deluge 1 Twilight Prophet 1 Baleful Strix 1 Connive // Concoct 1 Lazav, the Multifarious 1 Master of Death 1 Choked Estuary 1 Darkwater Catacombs 1 Drownyard Temple 1 Fetid Pools 1 Hostile Desert 1 River of Tears 1 Sunken Hollow 1 Brainstorm 1 Consider 1 Curate 1 Deep Analysis 1 Enhanced Surveillance 1 Ephara's Dispersal 1 Mulldrifter 1 Nightveil Sprite 1 Otherworldly Gaze 1 Thoughtbound Phantasm 1 Animate Dead 1 Necromancy 1 Price of Fame 1 Ravenous Chupacabra 1 Shriekmaw 1 Sinister Starfish 1 Syr Konrad, the Grim 1 Whispering Snitch 1 Dimir Spybug 1 Discovery // Dispersal 1 Disinformation Campaign 1 Notion Rain 1 Arcane Signet 1 Dimir Signet 1 Everflowing Chalice 1 Mind Stone 1 Sol Ring 1 Talisman of Dominance 1 Thought Vessel 1 Ash Barrens 1 Bojuka Bog 1 Command Tower 1 Dimir Aqueduct 1 Myriad Landscape 1 Mystic Sanctuary 1 Port of Karfell 1 Reliquary Tower 1 Rogue's Passage 1 Tainted Isle 1 Temple of the False God 1 Tocasia's Dig Site 9 Island 9 Swamp Revenant Recon Tokens 4 Copy // Zombie tokens 4 Salamander Warrior // Zombie tokens 1 City's Blessing (helper) // Zombie token 1 Vizier of Many Faces // Zombie token Copy // Zombie Salamander Warrior // Zombie City's Blessing (Helper) // Zombie Vizier of Many Faces // Zombie Deadly Disguise Kaust, Eyes of the Glade and Duskana, the Rage Mother are traditional foil cards

Creature - Shapeshifter Color tag templates(None) Jhoira's Familiar Flying Historic spells you cast cost less to cast