Sefris of the Hidden Ways + Radiant Solar + Naga Fleshcrafter + Chameleon, Master of Disguise

Sefris of the Hidden Ways

Radiant Solar

Naga Fleshcrafter

Chameleon, Master of Disguise

How it works

1. Put any nontoken creature onto the battlefield.
2. When the creature enters, Radiant Solar, Chameleon and Naga Fleshcrafter 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 Chameleon trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Radiant Solar.
5. Resolve the Naga Fleshcrafter 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 brilliant loop turns a single creature entry into a relentless engine of dungeon exploration, fueled by Sefris of the Hidden Ways tracking your graveyard and setting up the infinite recursion. As you cycle through the Tomb of Annihilation, Radiant Solar triggers off of every single entry and re-entry to push you deeper into the dungeon rooms. Meanwhile, both Chameleon, Master of Disguise and Naga Fleshcrafter enter as clever clones that immediately trigger more dungeon progress, ultimately spawning The Atropal tokens that force the legend rule and send pieces back to the graveyard. That graveyard trip satisfies Sefris of the Hidden Ways's completion trigger, bringing Radiant Solar right back to the battlefield to do it all over again.