The Dungeon Master

Spells you cast from your hand with mana value
7 or greater have "Cascade. cascade." (When you
cast one, exile cards from the top of your library until
you exile a nonland card that costs less. You may cast
it without paying its mana cost. Put the exiled cards
on the bottom of your library in a random order. Then
do it again.)
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We are stories; beginnings, middles, ends. Our power
lies in living lives that touch a life or two.