This will not match the main set because it is a Special Guest card, and a highly prized reprint from an earlier set
Its practically equal to a -1/-1 counter, the effect is the same, and I think designers didnt want a creature to have negative power
Once you begin casting the spell, opponents do not get priority until you finish
Modern Mono-White has real tools now
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Much like Scar, Mastermind - an underrated Amethyst card from The First Chapter, Maid Marian has an on-play effect that can take your opponent by surprise, giving you a chance to trade with their board for free, and establish a well-statted character that can start questing the very next turn