Mercy, Guardian Angel

At the beginning of each upkeep, you gain 1 life.

Caduceus Staff — {t}: Target creature you control other than Mercy, Guardian Angel gets +2/+0 or +0/+2 as long
as Mercy, Guardian Angel is tapped.

Guardian Angel — {w}: Mercy, Guardian Angel gains flying until end of turn. Untap it.

Resurrect — {3}{w}{w}: Return target creature card from
your graveyard to the battlefield that was put there from
the battlefield this turn.