Shadow reaper

In order to play this card you must sacrifice between three and five creatures you control on the battlefield if you do this creatures power and toughness is equal to the total power and toughness of the creatures sacrificed in order to play this card

{b}{b}{b} each creature your opponent controls gets -1/-1 and this creature gains +1+1 for each creature that received -1/-1

{b} pay one life if you do target opponent loses one life

{c} destroyed target creature