the median price is an astonishing $301
Either you need to keep your hand intact or you need your discard spell to nail a threat and not let them take it with theirs
We're talking recursion on cards like Eternal Witness, Baleful Strix or Selfless Spirit
Or you can discard a card and draw, so she's card flow, ramping, or making a Role for pumping your team or her
Take William Huey Jensens 244-card deck from the Top 8 of Grand Prix Milwaukee 2002, designed to exploit Battle of Wits, or Makihito Miharas 64-card Scapeshift deck from the Top 8 of Grand Prix Kobe 2011, where he needed a precise balanceenough Mountains for Scapeshift and enough blue sources for Cryptic Command
The art of all four cards is too amazing to keep them out of our list and we'd be happy pulling any of them from a booster pack