Karn solves problems and then sits there getting value every turn
You can always activate an ability that instructs a creature to adapt
Each pack contains 12 Magic cards, including 1 Mystical Archive card (Uncommon, Rare, or Mythic Rare), 1 Lesson card (Common, Uncommon, Rare, or Mythic Rare), 1 Rare or Mythic Rare, 1 foil of any rarity, 1 Wild Card of any rarity, 6 assorted Commons or Uncommons that are thematically connected (with Commons connected to other Commons and Uncommons connected to other Uncommons), and 1 Land cardplus 1 Art Card and 1 Ad/Token or special card from Magic 's history (a card from "The List")
Memory Jar forces players to exile all cards, redraw seven new ones and discard their hand at the beginning of their next turn