Primordial Genesis

Search your library for a creature card with
mana value X or less, put it onto the battlefield,
then shuffle.
Escape—{4}{g}{g}, Exile X creature cards from
your graveyard. (You may cast this card from your graveyard for its escape cost.)
"From the untouched wilds came the first, and from
beneath our feet came the rest."
—Aktu proverb