On 29/11/2025, I had a [Ozai, Phoenix King] with 4 red mana in my mana pool from the Firebending ability. I cast [The Last Agni Kai], having Ozai fight the opponent's [Walltop Sentries].

What I think should have happened: I spent 2 mana to cast Agni Kai, leaving 2 in the pool with the spell on the stack. Ozai fights the Sentries, I get 4 additional red mana; when Agni Kai finishes resolving and state-based actions are checked, I should have 6 red mana in their pool, so Ozai's static ability would give it indestructible and flying as SBAs are checked and so it shouldn't die to the Sentries' deathtouch.

What Arena did: Resolved the fight, gave me a single red mana in their mana pool, leaving mewith 3 mana, Ozai died. I then go on to lose the game due to this interaction.