He is staying away from the cloud of pollen. He's backing away and holding his breath and covering his nose and oh how convenient he doesn't even really have to breathe, how about he make it not able to get inside his body and not let it touch him too.

Still alkali.

Pollen pollen pollen it reaches him it burns.

He can heal himself up and then he can put some metal around him and you know what he thinks clothing that covers him properly would be nice so he'll just get some thicker clothing like – how about a hazmat suit, he doesn't know precisely how they work but he knows the material and can get most of it.

Yep, that works, now he's only being burnt by the pollen that's still inside the hazmat suit.

The plant-thing is less resilient than the dog thing. It takes only about twenty minutes to melt.

The pollen can be carefully removed. He can seal off parts of the suit and expel it and recreate it.

Stupid plant thing.

He rearranges the hazmat suit to attach to his skin around where his wings do and then uncovers them so he can actually fly and continues on his way.

No more fiends as large as those two or as mobile as the fish and the weird alien thing emerge again before he finally finds the exit of the cave.

Then he'll be out and decide to fly over the cave, thank you very much, and remove the hazmat suit unless the fog looks likely to be weirdly acidic.

Uh yeah "over" the cave is. Is very high. It is truly staggeringly high.

Around?

It is a less staggeringly long flight. Still probably hours longer than through the cave.

Except for the fact he would have had to backtrack a bunch through the cave. Because something would have bitten him or trapped him or somehow impeded his movement and he's able to fly quite quickly and much more peacefully over-and-around the stupid cave instead.

He wonders if it's man-made, an intentional trial. Maybe he was told sometime. He doesn't recall.

Maybe it was, maybe it wasn't.

The outside of the cave is cold. He is already pretty high up, even if he's going around instead of above.

He can warm up his skin and he can make himself some thicker clothing.

And he can spend hours flying.

He does. It's very boring.

He might try making a miniature replica of his house, in detail, very slowly. Golly, doesn't that sound like fun.

Sure, fun.

Oh look it's a... flying... bat... thing... with only one eye.

… How fast is it moving?

It can keep up with him.

He'll keep going, then, unless it starts to catch up.

In which case he will try raining small bits of alkali behind him, in low quantities so he doesn't destroy too much of the environment.

It doesn't need to catch up, since it can apparently shoot lightning out of its eye.

Except it's not really lightning, and it's a bit dizzying.

Theo does not immediately collapse when dizzied, manages to continue for a bit, and so long as it doesn't actively screw with his spatial memory he will rain alkali down on the thing.

Well it's not strong enough to actively screw with the spatial memory of a daeva.

Also, the lack of a solid thing to turn into the rain of alkali means this thing will take much longer to be killed.

Aaaand now it sends a sonic boom at him.

He's so glad it obeys his indestructibility and the fact he likes his head.

He's less glad about the sonic boom.

He falls, briefly, then catches himself.

How's another?

Another brief fall, another catch, and then some modification of his wings to make them a bit sturdier and he aims downwards to pick up speed.

Possibly risky but the only thing he really risks is smashing into the ground.