Modern has had a dizzying amount of turnover over the past few years, making it harder to justify dropping thousands of dollars on a deck than it was back when most decks had a two- to three-year viability window
$0.49 Pestilence 3rd Edition $0.59 Yarok's Fenlurker Core Set 2020 $1.29 Sludge Monster Innistrad: Midnight Hunt $0.39 Brood of Cockroaches Visions $0.35 Bushmeat Poacher Ikoria: Lair of Behemoths $0.35 Moonblade Shinobi Modern Horizons $2.99 Uchuulon Commander Legends: Battle for Baldur's Gate $2.49 Silent Hallcreeper Duskmourn: House of Horror $2.49 Ashiok, Nightmare Weaver Theros $0.35 Primordial Gnawer The Lost Caverns of Ixalan $0.35 Skullslither Worm Jumpstart 2022 $0.35 Severed Strands Double Masters 2022 0 results found
However, starting at 40 life gives you a bit more breathing room to draw those high-cost cards
Playing a card stores its seal in your "arcana gauge." In the example below, the astrologian draws The Ewer, which has the moon seal, then plays it, storing a moon seal in their arcana gauge
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I can see this finding a home in some lifegain Commander decks, but not much else, and her design is pretty spot-on to her video game counterpart