24 cards where the cards aren’t reprints and the mana cost is greater than or equal to {U/B}{U/B}

Ashiok, Dream Render (War of the Spark #228)
Memory Plunder (Shadowmoor #169)
Gyruda, Doom of Depths (Ikoria: Lair of Behemoths #221)
Sygg, River Cutthroat (Shadowmoor #176)
Glen Elendra Liege (Shadowmoor #163)
Oona, Queen of the Fae (Shadowmoor #172)
Nightveil Specter (Gatecrash #222)
Connive // Concoct (Guilds of Ravnica #222)
Indominus Rex, Alpha (Jurassic World Collection #14)
Cunning Nightbonder (Ikoria: Lair of Behemoths #219)
Dire Undercurrents (Shadowmoor #159)
Inkfathom Infiltrator (Shadowmoor #167)
Covetous Urge (Throne of Eldraine #207)
Deathcult Rogue (Gatecrash #218)
Shadow of Doubt (Ravnica: City of Guilds #253)
Mind Drill Assailant (Bloomburrow #225)
Dimir Strandcatcher (Ravnica: Clue Edition #30)
Flotsam // Jetsam (Murders at Karlov Manor #247)
Ghastlord of Fugue (Shadowmoor #162)
Cemetery Puca (Shadowmoor #158)
Dimir Guildmage (Ravnica: City of Guilds #245)
Whisper Agent (Guilds of Ravnica #220)
Wasp Lancer (Shadowmoor #179)
Wanderbrine Rootcutters (Shadowmoor #178)

This search is finished. Now the real work can begin.