First, Wizards went out of their way to redesign Magic cards for this mechanic, which creates the expectation that at least some of the cards with the mechanic will be playable
Rituals like Jeska's Will, Dark Ritual, and Rite of Flame are very thematic, but you should balance them with artifact ramp like Talismans and Signets
Often, Sealed Deck games will get into stalls where both players have a lot of creatures and neither player can attack very well
Magda, Brazen Outlaw Magda, Brazen Outlaw got a lot of people brewing decks when it came out in Kaldheim , as people experimented with different combinations of Dwarves, Treasure enablers, and payoffs to see which combination was most consistent
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