Impescapable Churning

Look at the top four or the bottom four
cards of your library. Put one into you hand,
one on the bottom of library, one into your
graveyard, and one in the sanctum.
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"What takes our humanity? Is it in the black
sky? The ashen remnants of our world before?
Their oil? No, it is the cycle Bonzello speaks of.
—Dack Fayden