That he can, yep, and the fiends don't react well to acid raining on them. They're still fast, though, so it doesn't always rain on them unless Theo actually makes a pretty voluminous... volume... of the ceiling rain.

Yes, yes, he can totally do that and get acid all over himself, gosh, isn't this painful, but at least he's not immobile because he got his wing bitten.

Not yet, at least.

He might be immobile because he got his wings acid'd on. Maybe.

He should also be mindful of not completely destroying the only path regular human summoners have to get to Zanarkand, perhaps.

His wings can be rehealed quite quickly, actually. And he's not destroying it all, he's just… killing the fish. He's not melting all of the roof into acid.

Then the fish shall be killed and he shall be freed of fiends for long enough that he can safely cross the water.

… And then fly up through the hole in the ceiling? He's hoping the hole he made earlier is still visible but if not he'll just dig upwards somewhere.

There's actually a completely natural ramp leading back up to the original cave which he completely missed in his flight from the fiends earlier.

Of course there is.

Well he'll just take that and go see the meteor dog. Which is hopefully still stuck in the ground and totally amenable to being killed by acid.

Nope, meteor dog is not there.

It doesn't seem to have fought its way out of the ground, though. It seems to maybe have just... evaporated... from where it was.

Gosh, perhaps it died from lack of moving room or something, how terrible.

He flies back out the cave. He's pretty sure it wasn't that hard a route to go back along.

Oh look there's meteor dog again where did it come from who cares there's a meteor.

Well Theo goes smoosh and on fire and is in terrible pain again then.

… Terrible-ish. He's still a daeva, and he gets up relatively shortly.

And now there is a giant pink dog lunging at him and trying to grab him with its teeth. Given that it is approximately three times as tall as Theo is, that would be pretty unpleasant.

Acid acid acid acid acid please acid work.

(He tries moving away at the same time.)

Acid does hurt the thing, but it is a thing made of magic and anger so it does not work nearly as quickly or effectively as it would against a creature made of biology the same size.

He thinks there are some more corrosive alkalis, he'll go through a few alkalis he knows and hope that they do more damage after the acid is neutralized.

(Augh.)

They do! Still not nearly as much as they would a biological dog.

And now its shaking its head with Theo in its mouth like he were a chew toy.

How about the teeth go dissolve too. He thinks that's doable. And the rest of the mouth. And the face, and the whole head.

Stupid dog.

That will take quite a bit of acid but eventually the dog will have been hurt enough that it will start evaporating into pyreflies.

Theo is probably about as hurt as he was when he went through Sin's field, except repeatedly.

How nice.

He heals up and then recreates his clothing and goes to fly out of the cave.

Is that a giant tentacled plant thing? Why, yes it is!

Alkali. There is now alkali raining down on it.

It tries to take a swipe at him, which is interesting seeing as it has no eyes.

It might have photoreceptive skin or it might just be plain magic, he doesn't care because he is trying to stay out of the way and can alkali it.

Alkali hurts! Look at it, shaking and dancing and... making a cloud of pollen? That seems to be spreading much too fast and in all directions?