Radiant Solar + Sefris of the Hidden Ways + Werefox Bodyguard + White Plume Adventurer

Radiant Solar

Sefris of the Hidden Ways

Werefox Bodyguard

White Plume Adventurer

How it works

1. Cast Werefox Bodyguard by paying its mana cost.
2. When Werefox Bodyguard enters, it and Radiant Solar trigger.
3. Resolve the Werefox Bodyguard trigger, exiling White Plume Adventurer until Werefox Bodyguard leaves the battlefield.
4. Resolve the Radiant Solar trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Werefox Bodyguard.
5. Werefox Bodyguard leaves the battlefield, causing White Plume Adventurer to be returned to the battlefield from exile.
6. When White Plume Adventurer enters, it and Radiant Solar trigger.
7. Resolve the White Plume Adventurer trigger, venturing into the Cradle of the Death God room, creating a 4/4 legendary The Atropal creature token and completing Tomb of Annihilation.
8. If you control two or more The Atropal tokens, put all but one into your graveyard due to the legend rule.
9. Sefris' second ability triggers, returning Werefox Bodyguard from your graveyard to the battlefield.
10. When Werefox Bodyguard enters, it and Radiant Solar trigger.
11. Resolve the Werefox Bodyguard trigger, exiling White Plume Adventurer until Werefox Bodyguard leaves the battlefield.
12. Resolve the Radiant Solar trigger from step 10, venturing into Tomb of Annihilation and into the Trapped Entry room, causing each player to lose 1 life.
13. Resolve the Radiant Solar trigger from step 6, venturing into the Oubliette room, causing you to discard a card and then sacrifice Werefox Bodyguard.
14. Repeat from step 5.

This intricate engine exploits a self-sustaining loop of entering and leaving the battlefield to rapidly race through dungeons over and over again. While White Plume Adventurer and Radiant Solar continually trigger dungeon progression upon entry, Sefris of the Hidden Ways watches over the graveyard to resurrect the loop's key sacrifice piece, Werefox Bodyguard. Because Werefox Bodyguard exiles White Plume Adventurer only to immediately sacrifice itself for the dungeon's demands, it neatly cycles itself back into the graveyard while liberating White Plume Adventurer to restart the whole sequence.