Creature - Human Shaman Dead Man's Chest Enchant creature an opponent controls When enchanted creature dies, exile cards equal to its power from the top of its owner's library
What flash card is next
It's so playable because it's so easy to assemble a game-winning combo with it, from Dramatic Reversal giving you infinite storm count to Narset's Reversal and something like Alrund's Epiphany netting you infinite turns
He features most prominently in Sauron, the Dark Lord decks, which may be a little bit off, lore-wise, but I'll allow it because of how effective he is at producing a threat in that deck
You would play a turn five Undo, and win the game
Granting illusionary drawback Blue is the color of illusions, so we have given it what we now call the "illusion drawback" (previously called "skulking" after Skulking Ghost, when the ability was in black), which forces the controller of the creature to sacrifice it if it is ever targeted