Vampire Conqueror

When Vampire Conqueror enters the battlefield,
you may pay {1}{r}. If you do, gain control of
target creature until end of turn. Untap that creature, and it gains haste until end of turn.
Desperation - When Vampire Conqueror enters
the battlefield when you have five or less life,
instead gain control of target creature for as long
as you control Vampire Conqueror. Untap that creature, and it gains haste until end of turn.