Invert Polarity Invert Polarity is kind of a messed up card, because the failcase is Cancel, while the upside is a lot like casting a 3-mana Fractured Identity to steal something off the stack
"In this older story, we learn that Nashi was born in a nezumi swamp village in rural Kamigawa, but his home was burned down and his parents slain by a malicious planeswalker named Tezzeret who believed the nezumi had a valuable artifact
Then whenever another permanent enters your battlefield, you reveal the top card of your library and you can draw it if it matches a permanent you control
Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle
Thats a pretty wicked advantage, especially considering this location has five will power, making it pretty tricky to take out