Magic: the Gatherings collaboration with Spongebob Squarepants is certainly one of the strangest Secret Lair crossovers that the game has seen
This idea functions not only in deck design (in which entire strategies can be summed up in a single word like lock or donk), it also works at the individual card level as well
Diminisher Witch Edea, Possessed Sorceress Eriette, the Beguiler Geralf, the Fleshwright Hama, the Bloodbender Hylda of the Icy Crown Lynde, Cheerful Tormentor Marina Vendrell Matoya, Archon Elder Outlaw Stitcher Ultimecia, Temporal Threat Ultimecia, Time Sorceress Winter, Cursed Rider
Double-sleeving might sound silly at first, but double-sleeved cards always come out safe while a single-sleeved card might still suffer when you look at the results between two cards that were put to the test
In theory, Spider-Man is a far more mainstream IP than Final Fantasy
so I wouldn't recommend running this guy in the maindeck anymore