Guan Yu, Sainted Warrior + Remembrance + Deathrender + Bloodflow Connoisseur

Guan Yu, Sainted Warrior

Remembrance

Deathrender

Bloodflow Connoisseur

How it works

1. Activate Bloodflow Connoisseur by sacrificing Guan Yu.
2. When Guan Yu dies, it, Deathrender and Remembrance trigger.
3. Resolve the Guan Yu trigger, causing you to shuffle it into your library from your graveyard.
4. Resolve the Remembrance trigger, causing you to search your library for Guan Yu and put it into your hand.
5. Resolve the Deathrender trigger, putting Guan Yu from your hand onto the battlefield, and attaching Deathrender to it.
6. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
7. Repeat.

This clever loop turns Guan Yu, Sainted Warrior into a self-replacing sacrifice engine by exploiting the exact timing of simultaneous triggers when he hits the graveyard. While Bloodflow Connoisseur provides the outlet to sacrifice him and grows with infinite +1/+1 counters, Deathrender immediately catches the falling warrior to cheat him right back onto the battlefield equipped and ready to repeat the cycle. Meanwhile, Remembrance ensures you never run out of gas by fetching Guan Yu straight from your library back to your hand in response to his own shuffle ability, closing the loop for an endless stream of sacrifices and creature entries.