Burning Chains When the chosen player loses the game, you win the game
In Pioneer, it's a key combo piece with Mox Amber and Retraction Helix
Like most Magic: The Gathering cards, the value of Wrenn and Seven depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Duskmourn: House of Horror Commander)
2 Legendary cards in every packeach booster also contains at least 2 Legendary cards, including 1 Rare or Mythic Rare
CHOCOBO BUNDLE CONTENTS Ten 14-card Play Boosters, a 12-card Chocobo Booster, 1 alt-art Traditional Foil promo card, 1 of 24 Scene Cards, 32 Basic Lands (16 Traditional Foil, 16 regular), a special Click Wheel life counter, and a Chocobo Edition card box
It then wins the game by, you guessed it, milling the opponent until they have no cards left in their library