Radiant Solar, Sefris of the Hidden Ways, Werefox Bodyguard, and Cloister Gargoyle

Prerequisites

• Radiant Solar on the battlefield
• Sefris of the Hidden Ways on the battlefield
• Werefox Bodyguard in hand
• Cloister Gargoyle on the battlefield
• available

Steps

1. Cast Werefox Bodyguard by paying its mana cost
2. When Werefox Bodyguard enters, it and Radiant Solar trigger
3. Resolve the Werefox Bodyguard trigger, exiling Cloister Gargoyle until Werefox Bodyguard leaves the battlefield
4. Resolve the Radiant Solar trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Werefox Bodyguard
5. Werefox Bodyguard leaves the battlefield, causing Cloister Gargoyle to be returned to the battlefield from exile
6. When Cloister Gargoyle enters, it and Radiant Solar trigger
7. Resolve the Cloister Gargoyle 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 Werefox Bodyguard from your graveyard to the battlefield
10. When Werefox Bodyguard enters, it and Radiant Solar trigger
11. Resolve the Werefox Bodyguard trigger, exiling Cloister Gargoyle until Werefox Bodyguard leaves the battlefield
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 Werefox Bodyguard
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