Pricing on this is floating around $7.81 or so, and typical builds will use four to speed up getting those Trainers into play, which adds up to over $30
It throws everyones plans into disarray

3 Blood Cultist Boltbender Boris Devilboon Boros Guildmage Boros Reckoner Burning Prophet Burning-Fist Minotaur Cadric, Soul Kindler Celes, Rune Knight Cinder Seer Coruscation Mage Crackling Cyclops Crackling Spellslinger Cyclops Electromancer Cyclops Superconductor Dismissive Pyromancer Dragon Mage Drannith Stinger Dreadhorde Arcanist Dualcaster Mage Dwarven Forge-Chanter Dynaheir, Invoker Adept Ecstatic Electromancer Electrostatic Infantry Elemental Expressionist Embermage Goblin Embodiment of Flame Emeritus of Conflict Eruth, Tormented Prophet Esper Terra Etherium-Horn Sorcerer Exhibition Magician Fervent Paincaster Firefist Adept Fireslinger Fissure Wizard Flame Channeler Flamekin Herald Gandalf of the Secret Fire Gandalf the Grey Garth One-Eye Ghen, Arcanum Weaver Ghitu Amplifier Ghitu Chronicler Ghitu Journeymage Ghitu Lavarunner Gleeful Arsonist Goblin Cruciverbalist Goblin Electromancer Goblin Flectomancer Goblin Pyromancer Goblin Researcher Goblin Test Pilot Goblin Wizard Gogo, Mysterious Mime Goliath Daydreamer Grim Lavamancer

At that point I was able to live a dream that I've had for a while
Packs may contain Special Guests, Mana Foils, Extended-Art cards, plus borderless cards, Rares, and Mythics well-positioned to become your collections new crown jewels