Dawn of the Eldritch Sun

Counter target spell with converted mana cost X
or less and put a +1/+1 counter on X creatures
you control. If X is 4 or more, you may cast one creature you own outside the game with
converted mana cost X or less.
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"The first thing I remember was gazing down at
myself and pondering my identity. I still visit that
river on occasion, looking at that queer monolith.
Was I... summoned here?"
—Cthylla