Does balor’s Death Throes apply only when it dies in the Abyss?

Out of the Abyss: Power Word Kill has no saving throw

Out of the Abyss – Official ERRATA

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Out of the Abyss ERRATA 2020

I’m running Out of the Abyss today for the first time in two months and honestly I’m scared

Is there a pronunciation guide for Out of the Abyss?

I’m planning on running Out of the Abyss and Storm King’s Thunder together, any suggestions?