Petradon

Exiling two lands looks like a brutal tempo play until you read the back half: when this leaves the battlefield, the lands come back. The mana denial is rented, not owned, and the lease runs only while you keep a 5/6 alive. That tension is the whole design problem the card hands you. Send it into combat or chump it away and you return two lands at a moment your opponent gets to choose; protect it and you strand them only while the body survives. The firebreathing rider compounds the bargain, asking you to pour red mana into a creature whose death undoes the only thing it accomplished. As large-creature design from an era fond of temporary disruption stapled to fragile beaters, it reads as a deliberate trap. There is, however, a way to make the rental permanent: because the controller picks the targets, you can respond to your own enters trigger by sacrificing or bouncing the creature. The leaves trigger goes on the stack and resolves first with nothing exiled to return, then the enters trigger resolves, exiling two lands with no creature left to ever bring them back. What undermines the honest line is that the lands otherwise return untapped and ready, so an opponent who answers Petradon on their own terms swings the mana advantage back in a single turn. Eight mana for a swing your opponent can reverse, unless you spend it to kill your own creature, is the math that kept it a curiosity rather than a staple.