Fiendish Abominations in a Gorechenyan Cave

2 Jestani
The creatures unfortunately are from this plane, as they return to the chamber about a minute later. Since Riven made Hesior's sword emit light, we are able to see the abominations. The creature has the arms and claws of a bear, a carapace and is covered in fur. It's body is long and gangly, like a ferret-ear, with pincers like an insect, and instead of a mouth it's bear-like teeth surround an orifice. It attacks Hesior, but I hurl a lightning bolt from my wand from behind Riven, scaring it's back as it fails to get out of the way. We defeat the two, and take the chance to investigate their corpses to learn more about them.
 
Hesior looks into the creatures, though he has worked more with "people folk", but relying on the story's of his father, it seems to be a fiend native to this plane. Presumably, they hunt in packs as we found them two at once. They are both of the same sex(?), perhaps indicating pack more than mates, but it remains inconclusive. I let Syvanta know through sending "Killed two abominations, none of us recognise them. We're through a cave from the far end of the big slanted market. Bodies are there. Toodles."
 
From the small chamber, there is a way deeper into the subterranean ravine, and there is the rope back up the cliff. We make our way downwards further into the cave system, with a gentle slope. Hesior continues with his lit sword with Riven and I lurking beyond the light's edge. Riven finds more claw marks, some leading up to where we came from, and some that leads deeper into the cave system. Some marks appear to even go up the side of the cave. We follow these deeper into the ravine, as it grows deeper and wider as time goes on. After 10 minutes of walking, we reach what appears to be an explicitly carved tunnel intersecting the natural ravine, it's straight trajectory bellying it's constructed nature. The claw marks that we've been following go to the right, although there are also tracks crisscrossing the intersection.
 
We find a piece of paper, after mending it, I can read on the parchment (with comprehend languages), I realise that this is Abyssal and it's a curse. I stop reading it. Upon closer inspection, and after checking with Riven, I note that it's written in Aeillan letters. I had stopped reading it as I noticed a headache setting in. I try to investigate it magically, but the headache swells into a full migraine (-1 on intelligence checks for 1 hour). We press on, and roughly 20 minutes further down the shaft (about an hour after the fight) we hear a child's scream and a roar akin to the abominations from earlier. Hesior goes up ahead to scout out, Riven and I following about 3 minutes behind. After we catch up with Hesior, he tells us that a more person-looking thing portalled in, communicated with them and kidnapped presumably the Gorachenyan child we heard earlier. A 30ft foot down, 10 foot wide chasm seperates us from where they were meeting, where the fiends have since scattered.
 
Hesior swaps a duplicate over to the other side. Riven brings me across by flying, as I'm just light enough. My arcana check tells me that the teleportation led to another plane. We now know that the creatures kidnapping children, fiends from this plane, and that they are working with someone from beyond this plane, and that that person is taking the kids away. There is also the parchment of the curse in Abyssal Aeillan. We retrace our steps, passing the two dead fiends and climbing up our rope. Back in the market, we use our map of the town to navigate back to Vadim to inform him of the two bodies that should be retrieved. He collects some of his men, and we can see that as he gives the orders they are all universally spooked.
 
We lead them back to the landing, Riven and I descending first. Riven illuminates the area, and I call for Vadim. He lands and with a ghostly-white face confirms their worst fears - these are the mythical Podluzhnik that were used to keep children behaved, having not been seen for over a thousand years - he suggests that we keep this quiet. We depart to go meet with Syvanta.