Sometimes the threat of interaction is just as strong as the card itself
For more on the number of cards in different formats, see How Many Cards in an MTG deck
Ace, Fearless Rebel Adric, Mathematical Genius Amy Pond An Unearthly Child Barbara Wright Bear's Companion Bill Potts Cartographer's Companion Cathar's Companion Clara Oswald Dan Lewis Donna Noble Graham O'Brien Gyruda, Doom of Depths Gyruda, Doom of Depths Ian Chesterton Inchblade Companion Initiate's Companion Jamie McCrimmon Jegantha, the Wellspring Jo Grant K-9, Mark I Kaheera, the Orphanguard Keruga, the Macrosage Leela, Sevateem Warrior Lurrus of the Dream-Den Lutri, Pauper Otter (playtest) Lutri, the Spellchaser Martha Jones Mowu, Loyal Companion Nardole, Resourceful Cyborg Nyssa of Traken Obosh, the Preypiercer Peri Brown Romana II Rose Tyler Ryan Sinclair Sarah Jane Smith Searchlight Companion Spirited Companion Susan Foreman Tegan Jovanka Trusty Companion Umori, the Collector Vislor Turlough Yasmin Khan Yorion, Sky Nomad Zirda, the Dawnwaker

P/T Number 254 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless Rulings (10/4/2004) Creatures are only put into a graveyard for having 0 toughness when state-based actions are checked
See, there's some weirdness to the Story Spotlight cards still, and I think it's worth taking a look at what cards were chosen and ask whether you really can get the basic storyline of Kaladesh in just ten cards
It could see testing in a modified Dimir Midrange shell, or a Sultai self-mill list with Dredgers Insight and Stock Up, but honestly, it seems unlikely