That being said I actually think it's quite a small concern and think that in the right deck Dark Tutelage can be great
Here are a few: Atarka, World Render might have more of a win-more ability, but double strike on your dragons is a legit wincon

Ainok Strike Leader Basri Ket Basri, Tomorrow's Champion Battle at the Helvault Campsite Cuisine Crested Sunmare Crumb and Get It Dark Depths Dark Depths Defend the Rider Diamond Pick-Axe Dihada, Binder of Wills Dora Milaje Elite Elder Arthur Maxson Elspeth, Knight-Errant For the Common Good General's Enforcer Gideon, Ally of Zendikar Heliod, God of the Sun King Darien XLVIII Koma, Cosmos Serpent Koma, Cosmos Serpent Lena, Selfless Champion Lorehold Command Marit Lage's Slumber Moogles' Valor Myojin of Blooming Dawn Myr Matrix Myrkul, Lord of Bones Nahiri, the Lithomancer Necron Monolith Oketra the True Old Hob, Alleycat Blues Orcish Medicine Pharika, God of Affliction Prosperity Tycoon Reigning Victor Renegade's Getaway Rootborn Defenses Sapling Nursery Season of the Burrow Spirit Bonds Squad Commander Strefan, Maurer Progenitor Survive the Night T'Challa, the Black Panther Thalia's Geistcaller The Book of Vile Darkness The Great Mound The Sentry, Golden Guardian Vibranium Mining Mech

Tapu Koko ex is classified as a 2-Stars card in the Extradimensional Crisis set
Modern Horizons 3 also contributed heavily to the prices of the energy/aggro decks, as Ajani, Nacatl Pariah/Ajani, Nacatl Avenger, Ocelot Pride, and a little card named Ragavan, Nimble Pilferer run about $10, $40, and $50 respectively
Toploader Binder Collection Ultimate protection for your high-value grail cards