Grimbreaker-lord of death

flying menace trample
{b}{b}{p/b}{p/b}{b/g}{b/r}{w/b}{u/b}all off your cards abilities double
if an opponent's non-all-black sources would affect Grimbreaker-lord of death the sources would be discarded and you gain one life for each card discarded in this way
when Grimbreaker-lord of death enters the battlefield you lose 20 life