sliver creatures you control have afflict 2. (whenever a creature with afflict 2 becomes blocked, defending player loses 2 life.)
whenever a nontoken sliver you control dies, amass slivers 2. (put two +1/+1 counters on an army you control. it's also a sliver. if you don't control an army, create a 0/0 black sliver army creature token first.)
