Eiden think it's some sort of golem. Or just some kind of giant made that just happens to be made of clay. It doesn't really make any difference what to call it if it's going to squash him.
The rocky terrain would be a pain in the ass to run so it's great that he's got wings but that thing is cutting it dangerously close, so when he spots the small crevice in the rock leading down to cave system it's either that or getting grabbed by the golem.
The fall is narrow and steep, forcing Eiden clench his teeth as he descends down nature's hell slide, made entirely out of rock and dust. He can see the giant finger attempting to fit down after him but ultimately gets stuck. The opening down this hole is so narrow is practically tossing Eiden, making it hard to spread his wings that feel like they're getting pretty tattered against the walls. Small rocks and dry mud falls after him in his fall that seems endless.
As the vertical tunnel opens into bigger area Eiden soon finds he still can't spread his wings properly. Quick glance in the back shows him it's crinkled, almost like paper, unable to hold weight. Eiden can only press his eyes shut, brace him to the fall against the cold hard ground.
---- only for it not to come.
Sure he lands on something but the fall seems to be cushioned by something. Slowly Eiden's eyes peer open as he turns to look at what he landed on.
It's been a while from the last time he saw the forest guardian and this... This... is some timing. No warning, no nothing. He thought he'd be happy and sure there's that relief but ultimately he completely doesn't know how to face him all in sudden like this, like he didn't embarrass himself the last time. The best thing he can do is to mumble out a weak greeting: