Fledgling Harpy

Flying, lifelink
{t}: Target opponent loses 1 life and you gain
1 life. Mature Fledgling Harpy. Activate this ability only any time you could cast a sorcery.
(To mature Fledgling Harpy, exile it. If you do, search your library for a non-Young creature card
that shares a creature type with it. You may cast it
by paying the difference in mana costs between it
and this creature. Then shuffle your library.)