Zo-Kalar, the Seer

When Zo-Kalar enters the battlefield, exile cards
from the top of your library until you exile a noncreature card with mana value less than or
equal to X. You may cast that card without
paying it's mana cost. If you do, copy it X times.
(A copy becomes a token.)
Zo-Kalar's toughness is equal to 1 plus X.
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The abyss stares back