We've got a spicy one today:
Opposition Agent 2B
Creature - Human Rogue
You control your opponents while they're searching their libraries.
While an opponent is searching their library, they exile each card they find. You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast them.
In addition to being backbreaking against any mana base reliant on fetchlands, this guy also hits the cards like Golos and Doomsday. Flash makes blowouts a very real possibility.
There are also cute interactions with Wishclaw Talisman and Maralen of the Mornsong.
Opposition Agent does very little against PO, so might have a fairly low ceiling in terms of mainstream playability, but it's one of the more exciting new printings to play with and build around, IMO.