Sefris of the Hidden Ways + Radiant Solar + Mercurial Pretender + Pirated Copy

Sefris of the Hidden Ways

Radiant Solar

Mercurial Pretender

Pirated Copy

How it works

1. Put any nontoken creature onto the battlefield.
2. When the creature enters, Radiant Solar, Pirated Copy and Mercurial Pretender 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 Pirated Copy trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Radiant Solar.
5. Resolve the Mercurial Pretender 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 turns the act of entering the battlefield into a relentless march through the Tomb of Annihilation dungeon, fueled by Sefris of the Hidden Ways watching creatures hit your graveyard. When a creature arrives, Radiant Solar, Pirated Copy, and Mercurial Pretender all trigger at once, rapidly advancing you through rooms that drain opponents and sacrifice your own pieces. As sacrifices and dungeon completions stack up, Sefris ofையான Hidden Ways triggers its Create Undead ability to pluck Radiant Solar straight out of your graveyard and return it to the battlefield, restarting the entire cycle. Meanwhile, copy mechanics are neatly utilized by having Mercurial Pretender and Pirated Copy mirror the necessary permanents to manipulate dungeon progression and token creation without needing separate unique cards for every step.