Radiant Solar, Sefris of the Hidden Ways, Faceless Butcher, and Aarakocra Sneak

Prerequisites

• Radiant Solar on the battlefield
• Sefris of the Hidden Ways on the battlefield
• Faceless Butcher in hand
• Aarakocra Sneak in hand
• available

Steps

1. Cast Faceless Butcher by paying its mana cost
2. When Faceless Butcher enters, it and Radiant Solar trigger
3. Resolve the Faceless Butcher trigger, exiling Aarakocra Sneak
4. Resolve the Radiant Solar trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Faceless Butcher
5. When Faceless Butcher dies, it triggers, returning Aarakocra Sneak from exile to the battlefield
6. When Aarakocra Sneak enters, it and Radiant Solar trigger
7. Resolve the Aarakocra Sneak trigger, venturing into the Cradle of the Death God room, creating a 4/4 legendary The Atropal creature token and completing Tomb of Annihilation
8. If you control two or more The Atropal tokens, put all but one into your graveyard due to the legend rule
9. Sefris' second ability triggers, returning Faceless Butcher from your graveyard to the battlefield
10. When Faceless Butcher enters, it and Radiant Solar trigger
11. Resolve the Faceless Butcher trigger, exiling Aarakocra Sneak
12. Resolve the Radiant Solar trigger from step 10, venturing into Tomb of Annihilation and into the Trapped Entry room, causing each player to lose 1 life
13. Resolve the Radiant Solar trigger from step 6, venturing into the Oubliette room, causing you to discard a card and then sacrifice Faceless Butcher
14. Repeat from step 5

Results

• Near-infinite ETB
• Near-infinite LTB
• Near-infinite death triggers
• Near-infinite lifeloss for all players
• Near-infinite sacrifice triggers