Sefris of the Hidden Ways + Radiant Solar + Spark Double + Sakashima's Student

Sefris of the Hidden Ways

Radiant Solar

Spark Double

Sakashima's Student

How it works

1. Put any nontoken creature onto the battlefield.
2. When the creature enters, Radiant Solar, Spark Double and Sakashima's Student 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 Sakashima's Student 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 engine leverages Sefris of the Hidden Ways as your graveyard-recursion engine, turning dungeon completions into an endless resurrection loop. Radiant Solar is the vital spark that constantly triggers dungeon progression upon entry, while Spark Double and Sakashima's Student continuously copy your creatures and rapidly advance you through the Tomb of Annihilation. Because the legend rule forces extra copies of The Atropal into your graveyard, Sefris's *Create Undead* ability triggers to pull Radiant Solar right back to the battlefield, endlessly repeating the cycle for near-infinite creature entry and sacrifice triggers.