If you can't or choose not to, you sacrifice the permanent
Card not found, on the other hand, is the basis for a deck in Modern (its namesake actually) and played in Legacy Storm decks (maybe Vintage as well, I dont know the format enough to say)
Volcanic Island ($862) One of the top duals on our list, Volcanic Island (or Volc) is not only used in most of the top decks in Legacy/Vintage, but its also in popular colors for Commander
Because these are so expensive and in such high demand, theres also the potential for fakes
However, there has yet to be a timeframe connected to this event
Of course, if youre deckbuilding to complement this scheme you can make things more secure with life-loss-doublers such as Bloodletter of Aclazotz swapping an opponent to a lower life total doesnt deal damage, but it does count as them losing life equal to the difference