Argawrath Flames Spent

When Argawrath enters the battlefield exile all creatures under him
Argawraths power is equal to the total power and toughness of all creatures exiled under him
Whenever another creature leaves the battlefield
or enters the graveyard exile it under Argawrath
{2}{b}{r}{t} Exile any number of creatures exiled
under Argawrath any target is dealt X damage
where X is the total power and toughness of the
exiled creatures