Goliath Truck Grond, the Gatebreaker Guidelight Pathmaker Haunted Hellride Heart of Kiran Hedge Shredder High-Speed Hoverbike Hoard Hauler Honeymoon Hearse Hulldrifter Imperial Recovery Unit Imposter Mech Invasion Submersible Irontread Crusher Jackdaw Jetfire, Air Guardian Knight Paladin Kylox's Voltstrider Lifecraft Engine Lumbering Worldwagon Luxurious Locomotive Magicked Card Magitek Armor Magmatic Galleon Marauding Dreadship Marshals' Pathcruiser Mechtitan Core Megatron, Destructive Force Meldweb Strider Midnight Crusader Shuttle Midnight Mangler Mighty Servant of Leuk-o Mindlink Mech Mizzium Tank Mobile Garrison Mobile Homestead Mobilizer Mech Mole Module Mukotai Soulripper Mysterious Limousine N'Yami-Class Mother Ship Nautiloid Ship Necron Monolith Night Scythe Optimus Prime, Autobot Leader Ovalchase Dragster Parhelion II Passenger Ferry Peacewalker Colossus Phantom Train Phoenix Fleet Airship Possession Engine Prodigy's Prototype Prowl, Pursuit Vehicle RMS Titanic Raiders' Karve Rangers' Aetherhive Rangers' Refueler Ratchet, Rescue Racer Reaver Titan Reckoner Bankbuster Recon Craft Theta Renegade Freighter Ribskiff Ripclaw Wrangler Rocketeer Boostbuggy Rolling Hamsphere Rover Blades Royal Talon Fighter Jet S.H.I.E.L.D

The recognizable traits of every Sultai Delve deck will be making use of the graveyard, removal spells, card advantage, and good ways to block non-flying creatures (stall the board)
If Betrayer's Bargain resolves, its effect causes the creature to be exiled any time it would die that turn, not just if it would die as a result of damage dealt by Betrayer's Bargain
Nethroi, Apex Of Death can trigger this effect multiple times since green, black, and white generally have the cheapest mutate creatures, and Nethroi's ability triggers whenever it mutates, not just when it's cast
While it is true that each card is subjected to rigorous testing and revisions (in some cases hundreds of hours per card ) prior to release, the simple fact is that the play design team is massively outnumbered by the millions of Magic players around the globe