Although Marvels IP holders at Disney gave Rosewater and his team freedom to design around a wide range of characters, locations, and other elements of the Marvel universe, the Marvel Super Heroes set is broadly built around the concept of the Avengers super hero team, with significant typal set mechanics revolving around the Hero and Villain creature types
There are tons of weird things that come up when you can splice text onto any instant or sorcery
Which is part of the upgrade list in that article
Any existing effects or counters that raise, lower, or switch a creature's power and/or toughness continue to apply to the creature's new base power or toughness
The card is in good condition, with clear imagery and text
It could also act as a pseudo Rishadan Port and combo'd weirdly with a bunch of artifacts (since they would turn off when tapped)