When Kokusho dies, it and Enduring Renewal trigger.
Resolve the Enduring Renewal trigger, returning Kokusho from your graveyard to your hand.
Resolve the Kokusho trigger, causing each opponent to lose 5 life and you to gain life equal to the life lost this way.
Crystalline Crawler triggers, putting a number of +1/+1 counters on it equal to the life you gained.
Resolve the Viscera Seer ability, causing you to scry 1.
Activate Crystalline Crawler's first ability six times by removing six +1/+1 counters from it, adding ({4} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Repeat.
Results
Near-infinite +1/+1 counters on Crystalline Crawler.