You can find cards with the showcase Ring treatment in Set, Draft, and Collector Boosters
The full texts of these abilities are "At the beginning of the monarch's end step, that player draws a card" and "Whenever a creature deals combat damage to the monarch, its controller becomes the monarch." If the triggered ability that causes the monarch to draw a card goes on the stack and a different player becomes the monarch before that ability resolves, the first player will still draw the card
Previously, depending on the format, a Blue deck would play some mix of Logic Knot, Mana Leak, and well, that's mostly it
God-Eternal Oketra A token generator that turns all your creature spells into two bodies is very useful, and the fact that both God-Eternal Oketra and its tokens are zombies gives it a home in Varina, Lich Queen decks (it was also reprinted in the Eternal Might precon from Aetherdrift Commander , so its often used in Temmet, Naktamun's Will decks)
Even moreso with the shift in how art cards will be handled in future sets
