Strixhaven: School of Mages

Exponential Growth | Sorcery | | Until end of turn, double target creature's power X times. | Izzy

Dragonsguard Elite | Creature | Human Druid | Magecraft — Whenever you cast or copy an instant or sorcery spell, put a +1/+1 counter on Dragonsguard Elite. {4}{G}{G}: Double the number of +1/+1 counters on Dragonsguard Elite. | David Rapoza

Double Major | Instant | | Copy target creature spell you control, except it isn't legendary if the spell is legendary. (A copy of a creature spell becomes a token.) | Suzanne Helmigh

Witherbloom Command | Sorcery | | Choose two — • Target player mills three cards, then you return a land card from your graveyard to your hand. • Destroy target noncreature, nonland permanent with mana value 2 or less. • Target creature gets -3/-1 until end of turn. • Target opponent loses 2 life and you gain 2 life. | Dmitry Burmak

Rushed Rebirth | Instant | | Choose target creature. When that creature dies this turn, search your library for a creature card with lesser mana value, put it onto the battlefield tapped, then shuffle. | Jason Kang