That's where you open up some booster packs (usually six of them) and build a Magic deck from the cards in those booster packs (plus basic lands)
This means that, while you're often going to evoke this while tapped out to keep a pesky threat, like an opposing commander, off the board, you can also just play this to eat a smaller creature that foolishly strayed into combat thinking you had no blockers
Professor Onyx also features one of the new mechanics of Strixhaven , magecraft
Despite not being an ideal early mana accelerator, High Tides real power comes through once you find ways to untap your Islands and cast it multiple times
(Saw it Coming, Fateful Absence, Werewolf Pack Leader) 5 - Format warping
They can also view common cards in the archetype and make substitutions based on their collection