Sefris of the Hidden Ways + Radiant Solar + Undercover Operative + Clever Impersonator

Sefris of the Hidden Ways

Radiant Solar

Undercover Operative

Clever Impersonator

How it works

1. Put any nontoken creature onto the battlefield.
2. When the creature enters, Radiant Solar, Clever Impersonator and Undercover Operative 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 Clever Impersonator trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Radiant Solar.
5. Resolve the Undercover Operative 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 a simple creature entry into a relentless march through the Tomb of Annihilation dungeon, fueled by the relentless copying power of Clever Impersonator and Undercover Operative. As multiple triggers stack up, Radiant Solar ensures that every single creature entry sends your board deeper into the dungeon rooms. When the sequence finally forces you to sacrifice Radiant Solar and triggers the legend rule on your newly minted token, Sefris of the Hidden Ways swoops in to resurrect the Solar straight from your graveyard—ready to start the whole lethal pilgrimage over again.