Each opponent exiles until a nonland land is reveal, you cast without paying for them, make three Treasures, then if you cast it from your hand (god, I hope Prosper doesnt exile this at an end step), your next upkeep it all happens again, but this time you make four Treasures
For many, its the only way they can participate in the game with others in online communities
There is so much the card can do, from negating cards, to destroying multiple Monsters on the field while doing burn damage
Expect to see the Mythic God appear in Standard for as long as it remains legal, with some attention in Pioneer
The power comes not from the abilitywhich is strongbut from the potential to recur a strong synergy, often straight after a board wipe