It will be especially good in decks that can use -1/-1 effects
Flavor Text "Dormi bene, e che le ombre ti accolgano." P/T Number 577 Language Italiano Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Rulings (6/6/2025) If the target creature is an illegal target as Y'shtola Rhul's ability tries to resolve, it won't resolve and none of its effects will happen
These cards have all seen play in high-performing Standard Blue-based decks of the past, with Tempest Djinn and Dive Down, as well as already Standard Opt and Chart a Course seeing play in Autumn Burchett's Mythic Championship I winning deck, back in 2019
The first way is to draw all six of your Prize Cards, which you can do by knocking out your opponents Pokemon
Development: Not Problematic Curses, for the most part, aren't tournament-level cards, so there isn't much developmental concern over power level