Barbarian's Ultimatum

As an additional cost to cast this spell, pay any amount of life.
Gain control of any number of target creatures with total power equal to the amount of life paid to cast this spell until end of turn. Untap those creatures. They gain haste until end of turn.
"Join the Balduvian horde or die in the ashes of your village. It's a generous choice, don't you think?"
--Lovisa Coldeyes