Crisis of Darkmire

(A Crisis may only be cast during your first main
phase.)
Whenever a creature dies, put a crisis counter on
that creature's controller.
At the beginning of each player's end step, that
player may pay {x}, where X is the number of
crisis counters on him or her. If he or she
doesn't, that player loses X life, where X is the
number of crisis counters on that player's
opponent.