Enduring Renewal + Anticausal Vestige + Umbral Collar Zealot

Enduring Renewal

Anticausal Vestige

Umbral Collar Zealot

How it works

1. Activate Umbral Collar Zealot by sacrificing Anticausal Vestige.
2. When Anticausal Vestige dies, it and Enduring Renewal trigger.
3. Resolve the Enduring Renewal trigger, causing you to return Anticausal Vestige from your graveyard to your hand.
4. Resolve the Anticausal Vestige trigger, causing you to reveal the top cards of your library and put it into your graveyard if its a creature card, or draw a card otherwise, and then put Anticausal Vestige from your hand onto the battlefield.
5. Resolve the Umbral Collar Zealot ability.
6. Repeat.

This looping sequence relies on Enduring Renewal's static ability to instantly rescue your creatures from the graveyard whenever they die. By using Umbral Collar Zealot to sacrifice Anticausal Vestige, you trigger Anticausal Vestige's leaves-the-battlefield ability to generate a card draw and cheat a permanent into play, while Enduring Renewal loops the Vestige right back to your hand. You can then use Anticausal Vestige's warp cost to cast it again, feeding the cycle until you've drawn through your entire noncreature library and amassed near-infinite triggers.