Istith Weirding

Each opponent mills X cards and you scri X
where X is the total power among wizards
you control. Then, return each nonwizard
nonland permenent with mana value less
than the number of nonland cards in its
owner's graveyard to its owner's hand.
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Istith held secrets and dreams out at sea that
could rend the mortal mind, or unlock it.