Playing in an OotA game, we're level 14 and about to fight a demon lord. My character just got frightened for a whole combat, and it's the first time he'd ever been frightened (saved vs. fear against 3 demon lords so far, but not this thing) so it really shook him. He said some prayers and the DM liked the RP so he said "Your god blesses you.
Against this next demon lord, you can ask for the blessing and your god will cast an 8th level spell."
I'm playing a fighter. It's been 2 years since I paid attention to magic so my spell knowledge is very rusty. This isn't an easy choice.
What would be a good spell to ask for?
Notes:
- 8th level, or a lower-level spell cast as 8th with some leeway (for instance, protection from evil doesn't normally upcast but he suggested that spell as an option with 8 targets).
- Any spell list.
- It's a demon lord, so it will probably save against the spell. It might be god magic, but he's not the type of DM to remove chance.
- I don't want to use this spell to deal direct hp damage because that's someone else's wheelhouse.