Up ahead, three overhangs and on the wrong side of the canyon from him, Roob spied the vein of black-amidst-the-green running vertically along the wall and pooling at the bottom of the canyon. The black stood out starkly because of the green tint of the goggles and Roob pressed himself harder. He abandoned keeping his breath even and let it come in shortened bursts. Dust was coming up from the non-critical sections of the walls and floors of the canyon: the Change was starting just as Roob dived into the chasm, his vision swimming. Despite a lack of breath, Roob quickly set to work.
He knew that the critical material was a thin vein in the rock on the canyon edge, so it would hold; but, he didn’t have a survey-map of the area, and wouldn’t know how much of the rest of the canyon would hold against the Rain, and how much would turn critical, until the rain stopped and he left the crevice. Then there was the matter of whether or not he could leave the crevice once the rain stopped. Quickly he pulled a folding-screen made of critical material, hammered thinly into shape, out of his bag. Pulling off his glasses with the other hand; the charcoal colored light coming in from outside painted the chasm in its natural blood-red color. The tempered-glass joints squealed slightly as they rubbed against each other, more as Roob wedged the folding-screen into the entrance. It billowed out slightly, both to prevent too much pressure on the screen, and to prevent build-up near a shelter entrance.
Once that was in place, Roob quickly pulled out a glass bubble filled with a sky-blue, gel-substance and shook it, making sure to cover the openings; he set down the now-glowing container in what he assumed to be the center of the crevice, and pulled-out a bio-pen. The pen was filled with a similar substance as the lamp, but was made of less sturdy construction than glass. With the entrance-screen to his right, he went to the wall and drew a symbol on it, the bio-pen reacting with the critical material. The sigil started glowing brightly in a cobalt color as the critical material… pulsed is really the best word for it. Not wasting time, he drew another glyph on the entrance screen, and another on the wall opposite the first. Roob went to draw a third on the wall opposing the entrance, but didn’t find the wall. Instead it seemed the crevice continued. Cursing softly, he instead drew half the sigil overhead, and the other half under the lamp. Now he could rest, safe that the material would hold, and he would be able to leave.
Roob took a moment to settle everything, placing the unnecessary things back in his bag. He started to undo the straps for the leather, now that he was indoors, but stopped himself. His eyes moved opposite the opening, down the crevice. There was no way to know if the critical material continued to line it, and if it didn’t, he would have to be careful. Without the continued lining there was a greater likelihood that Rain would start pooling on the ground, but hopefully the Rain wouldn’t last long enough for that to happen. Running his hand down the wall (careful not to disturb the glyph), Roob picked up the lantern, left his bag behind and started his journey into the crevice.