Behold, A Flying Roll

When Flying Roll enters the battlefield, exile the top card
of each opponent’s library face down.

At the beginning of your upkeep, reveal one of those cards. If it’s a nonland card, Flying Roll deals damage equal to its mana value to that player unless they discard a card or sacrifice a permanent. If you control a creature with “prophet” in its name, you may deal that damage to any target instead.

Prophecy cannot be buried.