The Spacecraft's ability in practice introduces numerous decision points to a game
Welcome Decks are a familiar concept to some MTG players, although somewhat of a newly-revived one
I think its got a lot of potential in the 99 of various lifegain decks (both Trelasarra, Moon Dancer and Elas il-Kor, Sadistic Pilgrim spring to mind), but I could also see this as the commander of a creature-centric mono-white lifegain deck too
While Un-sets (like Unglued, Unhinged, Unstable, Unsanctioned, and Unfinity) are playable Magic cards, they exist outside the typical tournament legality and feature whimsical, often rule-bending mechanics
Every slab is a chance to uncover something special
Set boosters are a stellar product and are much better than Draft boosters for the vast majority of players who just want to crack packs , open value, and have a good time