Teyouma.
When he first sighted the trunk of this tree he thought nothing of it, and slipped on by in his prowling among the mosses. It was not until his shoulder brushed against it - close enough for the poisonous quills draping his shoulders to bend whisker-like in response - that Teyouma took proper notice of just how large the growth was. Beyond that it was the texture of the thing: porous, fleshy, so utterly unlike any rough-hewn tree or alien vine within this vibrant place.
He stopped immediately and pressed a cautious palm against the trunk, half expecting his hand to sink in to the substance, even entertained the thought of losing a limb to it; so he was quick, and when nothing happened after the initial probing he sniffed the surface of his palm to check for any clues. It smelled like everything else in Eridanus. As Teyouma grew bored of this lacklustre study his gaze drifted up, up, up, and through the netted branches of the forest he could see a deep shadow. If he squinted and focused, he thought he could see... gills.
Trees did not have gills. Mushrooms did, though. He knew that much. Could one such growth become so large as to block a span of the ceiling like this? He looked around quickly, then launched himself in to the lower branches of a young tree struggling in the shadow. From there he took to climbing and hopping intermittently, and managed to make it a few feet higher; but the mushroom's cap remained out of reach, and his arms were getting stiff.
He found a series of crossed branches spidering from a copse of trees and scrambled atop them, using his talons to hook against the bark, his tail to counter-balance, and occasional sweeps and tucks of his wings. They were useless in this place - his wings - as the forest's canopy was so thick that they became an obstacle to him; snaring on objects more than anything. But Teyouma found a spot to settle and to rest.
There was a good view of the mushroom's wide stalk from his roosting place, while a few giant branches palmed overhead, giving the illusion of safety and secrecy. He lingered there a moment or two to catch his breath; his heart pounded from all the climbing and the rest of him had begun to protest; his weak little meat suit was wiry at best, and he knew he would be sore if he sat too long.
When he had enough sitting in the dark, Teyouma crawled carefully along the limb, mindful of the damp moss that clung to every surface. He was thankful for his talons for the first time ever, although it was a passing thought. The further he went the more exposed he felt, but the closer he came to an exposed piece of the mushroom's stalk. There he pressed his palm upon it again, closed his eyes, and tried to connect with the mushroom with his magic. He did not know that he was incapable of this; only that there was a familiarity with the shroom, and an innate understanding of their sameness on some level.
The energy pulsed through him, from the center of his body out through the network of veins, filling him with the hum of magicka. A cloud of dust eddied around him imperceptively - at least until it built up and turned the air yellow, like motes of pollen sweeping through the treetops. Anywhere the dust settled came a higher pitched humming, and the moss he had crawled across began to shimmer and morph, sprouting in to a myriad of glossy orbs networked together; this spread immediately away from Teyouma and tapered out as it went, effectively producing a web of invisible growth beneath him. The rest, left suspended in the air, fell away and drifted among the trees, ready to infect anything - or anyone - that might surreptitiously wander by.