Cloak of the Unseen Wilds

At the beginning of your upkeep, you may
sacrifice a creature. If you do, search your
library for a creature card with lesser mana
value, put it onto the battlefield, then shuffle
your library. That creature gains hexproof
until end of turn.
—
"We remember the deeds of the dead, to live lives
anew."-Bareka of Shadowed Veils