Warrior of the Cursed Way

During your upkeep, opponents sacrifice
one creature and you gain life equal to half
its toughness rounded down.
If this creature is the only creature you
control then is gains Deathtouch, Lifelink,
Vigilance, Trample, Firststrike, and +5/+5.
Sacrifice this creature and return target
creature from your graveyard to the
battlefield under your control.
Even the blood of this warrior is deadly.