Xath, Harbinger of the Dead

{1} Untap Xath, Harbinger of the Dead
{2}{t} Xath, Harbinger of the Dead deals 2 damage
to target creature and you gain 2 life
{2}{b}{t} Create a 2/2 black Zombie creature token
{3}{u}{t} Target player puts the top four cards of
their library into their graveyard and you draw a
card
{4}{b}{t} Put target creature card from a graveyard
onto the battlefield under your control as a
Zombie in addition to it's other types