Keeper of the Fallen

Flying, Devour 1, Ward {p/c}{p/c}, Flash
Behest {2}{p/c}{p/c},{t}: Exile target creature from
your graveyard, then create a 1/1 token copy of it
with, "When this creature dies, conjure a
Hyrulean Knight to the top of your library"
Sacrifice five Hyrulean Knights: Return target creature from exile to your hand or this gains
Persist until your next turn.