Sefris of the Hidden Ways + Radiant Solar + Vizier of Many Faces + Spark Double

Sefris of the Hidden Ways

Radiant Solar

Vizier of Many Faces

Spark Double

How it works

1. Put any nontoken creature onto the battlefield.
2. When the creature enters, Radiant Solar, Spark Double and Vizier of Many Faces each trigger.
3. Resolve the Radiant Solar trigger, causing you to venture into Tomb of Annihilation and into the Trapped Entry room, causing each player to lose 1 life.
4. Resolve the Spark Double trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Radiant Solar.
5. Resolve the Vizier of Many Faces trigger, venturing into the Cradle of the Death God room, creating a 4/4 legendary The Atropal creature token and completing Tomb of Annihilation.
6. If you control two or more The Atropal tokens, put all but one into your graveyard due to the legend rule.
7. Sefris' second ability triggers, returning Radiant Solar from your graveyard to the battlefield.
8. Repeat from step 2.

This loop transforms the act of entering the battlefield into an unstoppable expedition through the Tomb of Annihilation, propelled by the relentless triggers of Radiant Solar, Spark Double, and a copy of Vizier of Many Faces. Because Spark Double safely strips away the legendary status, any excess Atropal tokens created at the end of the dungeon naturally succumb to the legend rule and tumble into your graveyard. That graveyard-bound trip acts as the ultimate catalyst for Sefris of the Hidden Ways, whose "Create Undead" ability immediately plucks Radiant Solar right back out of the dirt to restart the cycle anew.