Bouncing your own stuff is horrendous for tempo but none the less is often worth doing in the long games where you rely on a certain threat to win or really need the extra value from an enter the battlefield effect
However, themed Universes Beyond variants, like the Sonic the Hedgehog or Spider-Man Sol Rings, consistently outpace standard printings on the secondary market
China, however, is notorious for flouting these laws
Destroying a land whenever its tapped on someone elses turn is an incredibly powerful effect, and with this in play, games grind to a halt as people mostly stick to playing cards on their turns
A 3/2 with scry 1 is worthwhile in some places and a 2/1 that drew you a random land from your deck is great anywhere
Expensive as Fogs go, but what a complete blowout when someones come at you with Craterhoof Behemoth or any other Overrun effect