Sutured Dreadnaught

When Sutured Dreadnaught attacks, another target creature gets -X-X, where X is your devotion to black and green Phyrexian mana. (Each {p/b} or {p/g} in the mana costs of permanents
you control counts toward your devotion to black
and green Phyrexian mana.)
Whenever another creature dies, draw a card.
You lose 1 life.