Okay, so, real quick, I will place this here at the very start, if you don't want Tomb Of Annihilation spoilers, please do not read any further.
That being said, I'm deep into my blind run of ToA. We just entered the Tomb Of The Nine Gods last session.
My character allowed Wongo, one of the Trickster Gods, to inhabit his body. This gave me the RIDICULOUS power of having a DC 16 Wis Save Stun effect I can use as an action. As a Wild Magic Sorcerer, I have the quickened spell metamagic. So, I thought I'd get Immolation at next level, since the stun effect would go off first, thus making them fail the initial Dex throw.
Now, as per the Immolation spell description,
At the end of each of its turns, the target repeats the saving throw. It takes 4d6 fire damage on a failed save, and the spell ends on a successful one.
As per the Wongo Power,
While inhabited by Wongo, you can use your action to unleash a psionic assault on a creature you can see within 60 feet of you. The target must succeed on a DC 16 Wisdom saving throw or be stunned until the end of its next turn.
So, basically, I'm wondering, would the Stunned condition end before the secondary Dexterity saving throw was made? Or would the secondary throw automatically fail due to it being made before the condition wears off?