Azjol'Nerub

Azjol'Nerub comes into play tapped.
{t}: Add {u} or {b}.
At the beginning of each player's end step, if
you lost 5 or more life this turn, you may put a
quest counter on Azjol’Nerub. Then, if you do
and it did not have a quest counter on it, create
two 1/2 black Zombie Spider creature tokens.