Radiant Solar + Sefris of the Hidden Ways + Werefox Bodyguard + Barrowin of Clan Undurr

Decks

How it works

Cast Werefox Bodyguard by paying its mana cost.
When Werefox Bodyguard enters, it and Radiant Solar trigger.
Resolve the Werefox Bodyguard trigger, exiling Barrowin of Clan Undurr until Werefox Bodyguard leaves the battlefield.
Resolve the Radiant Solar trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Werefox Bodyguard.
Werefox Bodyguard leaves the battlefield, causing Barrowin of Clan Undurr to be returned to the battlefield from exile.
When Barrowin of Clan Undurr enters, it and Radiant Solar trigger.
Resolve the Barrowin of Clan Undurr trigger, venturing into the Cradle of the Death God room, creating a 4/4 legendary The Atropal creature token and completing Tomb of Annihilation.
If you control two or more The Atropal tokens, put all but one into your graveyard due to the legend rule.
Sefris' second ability triggers, returning Werefox Bodyguard from your graveyard to the battlefield.
When Werefox Bodyguard enters, it and Radiant Solar trigger.
Resolve the Werefox Bodyguard trigger, exiling Barrowin of Clan Undurr until Werefox Bodyguard leaves the battlefield.
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.
Resolve the Radiant Solar trigger from step 6, venturing into the Oubliette room, causing you to discard a card and then sacrifice Werefox Bodyguard.
Repeat from step 5.

In which brackets is this combo allowed, per Spellbook's Exhibition tier?

1–2 · Exhibition & Core

Allowed in this bracket.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.

How it works

Cast Werefox Bodyguard by paying its mana cost.
When Werefox Bodyguard enters, it and Radiant Solar trigger.
Resolve the Werefox Bodyguard trigger, exiling Barrowin of Clan Undurr until Werefox Bodyguard leaves the battlefield.
Resolve the Radiant Solar trigger, venturing into the Oubliette room, causing you to discard a card and then sacrifice Werefox Bodyguard.
Werefox Bodyguard leaves the battlefield, causing Barrowin of Clan Undurr to be returned to the battlefield from exile.
When Barrowin of Clan Undurr enters, it and Radiant Solar trigger.
Resolve the Barrowin of Clan Undurr trigger, venturing into the Cradle of the Death God room, creating a 4/4 legendary The Atropal creature token and completing Tomb of Annihilation.
If you control two or more The Atropal tokens, put all but one into your graveyard due to the legend rule.
Sefris' second ability triggers, returning Werefox Bodyguard from your graveyard to the battlefield.
When Werefox Bodyguard enters, it and Radiant Solar trigger.
Resolve the Werefox Bodyguard trigger, exiling Barrowin of Clan Undurr until Werefox Bodyguard leaves the battlefield.
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.
Resolve the Radiant Solar trigger from step 6, venturing into the Oubliette room, causing you to discard a card and then sacrifice Werefox Bodyguard.
Repeat from step 5.