As the booklet knowingly notes, Pendulum cards are complicated, and including them here would, almost certainly, have convoluted the set and defeated the point of its creation in the first place
Tasha provides card draw and exiles instants and sorceries to be used later with her negative ability

The Dungeons Baldur's Gate Wilderness Dungeon of the Mad Mage Lost Mine of Phandelver Tomb of Annihilation Undercity Venture Cards Acererak the Archlich Bar the Gate Clattering Skeletons Delver's Torch Displacer Beast Dungeon Descent Dungeon Map Eccentric Apprentice Ellywick Tumblestrum Fates' Reversal Fifty Feet of Rope Find the Path Fly Immovable Rod Intrepid Outlander Keen-Eared Sentry Kick in the Door Midnight Pathlighter Nadaar, Selfless Paladin Planar Ally Precipitous Drop Radiant Solar Ranger's Hawk Secret Door Sefris of the Hidden Ways Shortcut Seeker Thorough Investigation Triumphant Adventurer Varis, Silverymoon Ranger Veteran Dungeoneer Wandering Troubadour You Find a Cursed Idol Yuan-Ti Fang-Blade Yuan-Ti Malison Zalto, Fire Giant Duke Zombie Ogre Payoff Cards Acererak the Archlich Barrowin of Clan Undurr Cloister Gargoyle Eccentric Apprentice Ellywick Tumblestrum Gloom Stalker Nadaar, Selfless Paladin Precipitous Drop We should also probably mention Dungeon Delver and Hama Pashar, Ruin Seeker

Getting mana reduction and making your creatures cantrip makes this blue creature a powerful draw engine
I don't know but I'm grateful because this is the single best upgrade for Etrata
Take your favorite cards wherever you go without any hassle