The mechanic is almost certainly not evergreen, with the name of the set carrying a small amount of the crime spree flavor, but theres no reason why we wont see it pop up again in the future
This Bundle includes a full inventory of treasures, with 9 Magic: The GatheringFINAL FANTASY Play Boosters (each containing 14 cards), 2 Traditional Foil Extended-Art cards, 16 Traditional Foil and 16 nonfoil Full-Art Basic Land cards, 1 oversized Spindown life counter, 1 FINAL FANTASY card storage box, and 2 reference cards
If damage from a creature source is prevented this way, Comeuppance deals that much damage to that creature
For decks full of one or two drops, this card can be a nightmare for which they will happily trade multiple cards, as the Keg amounts to a two mana one-sided Wrath of God or sometimes even worse by killing artifacts like Cursed Scroll, Winter Orb or Ankh of Mishra