Sefris of the Hidden Ways + Radiant Solar + Sun Titan + Karmic Guide + Yahenni, Undying Partisan

Sefris of the Hidden Ways

Radiant Solar

Sun Titan

Karmic Guide

Yahenni, Undying Partisan

How it works

1. Activate Yahenni 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 Yahenni 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 Yahenni ability from step 1.
13. Repeat.

This loop turns the perpetual motion of your graveyard into an engine that endlessly sweeps you through dungeons. By using Yahenni, Undying Partisan as a reliable sacrifice outlet, you send Karmic Guide, Sun Titan, and Sefris of the Hidden Ways to the graveyard to trigger Sefris's dungeon-completing resurrection while Radiant Solar amplifies every single entry and exit with free dungeon ventures. Sun Titan and Karmic Guide continually pull each other and the rest of the team back to the battlefield, creating a self-sustaining loop that infinitely triggers enters-the-battlefield abilities, death triggers, and dungeon completions.