The Assassin's Guild

Counts as Blood Crypt
{t}: Add {b} or {r}.
As Blood Crypt enters the battlefield, you may
pay 2 life. If you don't, it enters the battlefield
tapped.

The members of the Guild of Assassins considered themselves cultured men who enjoyed good music and
food and literature. And they knew the value of
human life. To a penny, in many cases.