Sefris of the Hidden Ways + Radiant Solar + Spark Double + Chameleon, Master of Disguise

Sefris of the Hidden Ways

Radiant Solar

Spark Double

Chameleon, Master of Disguise

How it works

1. Put any nontoken creature onto the battlefield.
2. When the creature enters, Radiant Solar, Spark Double and Chameleon 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 Chameleon 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 magnificent engine turns dungeon exploration into a self-sustaining loop by leveraging Sefris of the Hidden Ways and Radiant Solar to continuously trigger venture effects whenever creatures enter and leave the battlefield. To get this machine moving, Spark Double and Chameleon, Master of Disguise step in as clever copy-makers that multiply your triggers and neatly sidestep the legend rule, ultimately finishing off the Tomb of Annihilation to spawn The Atropal tokens. Whenever those tokens hit the graveyard from the legend rule, Sefris triggers to bring Radiant Solar right back to the battlefield, restarting the cycle and draining your opponents to zero.