Sefris of the Hidden Ways + Radiant Solar + Sun Titan + Karmic Guide + Umbral Collar Zealot

Sefris of the Hidden Ways

Radiant Solar

Sun Titan

Karmic Guide

Umbral Collar Zealot

How it works

1. Activate Umbral Collar Zealot by sacrificing Karmic Guide.
2. Sefris' first ability triggers, causing you to venture into the final room of a dungeon, causing you to complete the dungeon.
3. Sefris' second ability triggers. Holding priority, activate Umbral Collar Zealot twice by sacrificing Sefris and Sun Titan.
4. Resolve the Sefris trigger, returning Karmic Guide from your graveyard to the battlefield.
5. When Karmic Guide enters, it and Radiant Solar trigger.
6. Resolve the Radiant Solar trigger, venturing into Lost Mine of Phandelver and into the Cave Entrace room, causing you to scry 1.
7. Resolve the Karmic Guide trigger, returning Sun Titan from your graveyard to the battlefield.
8. When Sun Titan enters, it and Radiant Solar trigger.
9. Resolve the Radiant Solar trigger, venturing into Lost Mine of Phandelver and into either available room.
10. Resolve the Sun Titan trigger, returning Sefris from your graveyard to the battlefield.
11. When Sefris enters, Radiant Solar triggers, venturing into Lost Mine of Phandelver and into any available room.
12. Resolve the Umbral Collar Zealot ability from step 1.
13. Repeat.

This intricate engine turns the graveyard into a revolving door by leveraging the relentless dungeon-crawling synergy between Sefris of the Hidden Ways and Radiant Solar. With Umbral Collar Zealot acting as a free sacrifice outlet to bin your creatures and grease the wheels with surveil, Sefris can continuously complete dungeons to trigger her "Create Undead" ability. This recursion is kept perpetually alive by Karmic Guide and Sun Titan, which cycle back and forth from the graveyard to the battlefield while repeatedly retriggering Radiant Solar's enter-the-battlefield ventures.