Double Take

Look at the cards in each opponent's hand and at
any face-down permanents, spells or cards. You
may exchange two of them.
Plot {u}{u} (You may pay {u}{u} and exile this card
from your hand. Cast it as a sorcery on a later turn
without paying its mana cost. Plot only as a sorcery.)
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If I walk would you run.
If I stop would you come.