Battle Hymn

Human Creatures you control have +1/+1, first strike, vigilance and reach.
Space marine creatures you control have double
strike and haste.
{2}{b}{b}: Exile Battle Hymn, sacrifice any number
of human creatures, choose one: Gain life equal
to the toughness of the sacrificed cards or deal
damage to a target player equal to the half power
of the sacrificed cards, rounding up.