This card saw a huge price spike despite Ruby/Sapphire falling from competitive popularity
Whenever you cast a noncreature spell with mana value 3 or greater, Y'shtola deals 2 damage to each opponent and you gain 2 life
On tabletop, Ishai, Ojutai Dragonspeaker has enough punch to be cEDH-viable when paired with Jeska, Thrice Reborn, who triples Ishai's punch and gives her access to red which is exactly what a partnership with Hugo Kupka will bring to Arena
You don't have to add four copies of each card to your deck though, and sometimes it's beneficial to have fewer copies and make room for other important cards

Best Disney Lorcana starter decks: Whispers in the Well Sapphire and Steel Azurite Sea Emerald and Sapphire Whispers in the Well Emerald and Amber Fabled Emerald and Ruby Shimmering Skies Ruby and Amethyst Reign of Jafar Amber and Amethyst Archazia's Island Ruby and Sapphire Reign of Jafar Ruby and Steel Shimmering Skies Emerald and Steel Fabled Amber and Sapphire Archazia's Island Amethyst and Steel Azurite Sea Amber and Ruby Rise of the Floodborn Amethyst and Steel The First Chapter Amber and Amethyst Ursula's Return Sapphire and Steel Rise of the Floodborn Amber and Sapphire The First Chapter Sapphire and Steel Into the Inklands Amber and Emerald The First Chapter Emerald and Ruby Ursula's Return Amethyst and Amber Into the Inklands Ruby and Sapphire Whispers in the Well - Sapphire and Steel Best cards: Judy Hopps, Uncovering Clues
Its win condition is to reach 20 Lore quickly while denying opponents the chance to stabilize, making it one of the most dynamic themed decks in Lorcana