Enduring Renewal + Crystalline Crawler + Sunbond + Kokusho, the Evening Star + Viscera Seer

Enduring Renewal

Crystalline Crawler

Sunbond

Kokusho, the Evening Star

Viscera Seer

How it works

1. Cast Kokusho by paying 4.
2. Activate Viscera Seer by sacrificing Kokusho.
3. When Kokusho dies, it and Enduring Renewal trigger.
4. Resolve the Enduring Renewal trigger, returning Kokusho from your graveyard to your hand.
5. Resolve the Kokusho trigger, causing each opponent to lose 5 life and you to gain life equal to the life lost this way.
6. Crystalline Crawler triggers, putting a number of +1/+1 counters on it equal to the life you gained.
7. Resolve the Viscera Seer ability, causing you to scry 1.
8. Activate Crystalline Crawler's first ability six times by removing six +1/+1 counters from it, adding 4.
9. Repeat.

This loop relies on the brilliant interaction between Enduring Renewal's static ability, which instantly loops any creature dying from the battlefield right back to your hand, and Viscera Seer, which provides a free and repeatable way to send Kokusho, the Evening Star to the graveyard. Every time Kokusho hits the bin, her death trigger drains your opponents and hands you a massive influx of life. That lifegain is caught by Sunbond enchanted onto Crystalline Crawler, showering the Crawler in a mountain of +1/+1 counters. You can then cash in those counters using Crystalline Crawler's mana ability to fund the re-casting of Kokusho, keeping the slaughterhouse running indefinitely until your opponents are completely drained of life.