Pauper started as a "home-grown" format on Magic Online that eventually attracted enough players that Wizards made a legality filter for it, and it grew and grew from there until now it's a legitimate paper tournament format
Same with Muldrotha, the GravetideMuldrotha, the Gravetide, who even lets you get the rest of the permanents in your yard, too
The idea is to use this effect to put our opponent in a compromising position , which opens the door to several possibilities, such as Forcing them to retreat a Pokmon that has no Energy to attack or a high retreat cost, allowing us to attack and steal its Health for a long-term advantage
Broadside Bombardiers Broadside Bombardiers just does so, so much damage
Evolving Wilds + Terramorphic Expanse are the classical guys to give us what we need