There is no set here, just something that's a lot more like a Golden Ticket than a Magic card
Madam Mim Elephant is a 3|7 Character that can move 2 damage counters from her to chosen opposing Characters, potentially banishing low-health characters or dropping them low enough for your attackers to banish them
Alternately, we can think about enchantment sweepers like Bane of Progress or Fracturing Gust
At the beginning of each end step, if you've been dealt 5 or more damage this turn, abandon this scheme
Maybe a friend gave you a bunch of cards, or in those first couple of Drafts you got more cards than you know what to do with
However, if your only attackers have 1 power, you can reliably attack with them on your turn thanks to your draw step