$5 million pokémon card Pokémon's Most Infamous Sells For $4,000,000 Controversial YouTuber pays over 4.4

The moment it isnt met, the landwalk effect stops: If a Lord of Atlantis is on the battlefield, the cunning opponent attacks with Silvergill Adept, and you only control one island, you may return that island to your hand through activating Meloku the Clouded Mirrors ability

It has impeccable interaction in Thoughtseize, Fatal Push, Go for the Throat, and Sheoldred's Edict

That was pretty much the end of its run, although it returned on Altar of the Goyf from Modern Horizons 2 and was reprinted in Modern Horizons 3

This is a very unfair card and I dont know how reprintable it is

It costs and lets you cast at least four mana value worth of spells at random off the top of your library each turn