Half-Life

For every one of your turns, add a lore counter to Half-Life. For the first lore counter, exile half of the creatures in play. Determine such creatures randomly, and do not factor your own out. Also, each player takes half their life in damage, rounded up. On the second lore counter, exile 1/4 of the creatures remaining in play. Also, each player takes 1/4 of their health in damage, rounded up. On the third, exile 1/8 of the creatures remaining in play. Also, each player takes 1/8 of their health in damag