Grade: C Zap and Stun arent great cards, but combining them with no increase in cost cant make them worse
Once it transforms into its Auntie side, it becomes a terrifying offensive threat that creates temporary copies of blighted creatures
Assuming that you don't have any cards in your graveyard, it will exile your entire library and you can win the game via Labratory Maniac, Jace, Wielder of Mysteries, and Thassa's Oracle
This card fits somewhat awkwardly into the current Green-White shell, Adventures, but I see a lot of solid support for an aggressive Constellation shell, and this is by far the best card to enable that strategy
For more price spike stories, check out the Izzet Lord of the Rings card that's making a splash in Modern, and the run of interest in BG3's Karlach card