Priority does not prevent a player from activating a card or card effect, but does prevent the game from turning into a Quick-Draw contest
If you have 2, you can go for a reanimator plan
Youll also want to be more critical of flaws in the packaging, damage to the box, or other tampering as older boxes are a rarer commodity by nature, making them a more profitable target for counterfeiters and scammers
In big multiplayer EDH games, the most value youll have from this card is to stop a combo or a big wrath, as well as to annoy players casting cards from exile, especially red players with their impulse draw
If you want a sealed box that keeps the hits and parallels coming while you build out Stellar Crown from the ground up, Pokemon: Stellar Crown Booster Box is the format to grab