The man shrieked. He might have been confused about why he had suddenly fallen, but that kind of cry was too much of an overreaction. As Yogiri thought that, the grass began to wrap itself around the man, which must have been what he was afraid of.

Yogiri no longer felt that calling the stuff “grass” was right. It was green, long, and thin, and covered the ground. It looked just like grass, but the way it writhed was unnatural.

“P-Please, save me! Pull! Get me outta here!”

The grass-like strands had wrapped entirely around the man. They groped all around his body, like they were trying to find the gaps in his armor.

“I guess I have to if we want you to talk.”

But if they got close enough to pull the man out, the grass would probably attack Yogiri as well, so he killed the grass around the man before approaching.

“I’ll help you, but answer some questions for me.”

“O-Okay! I’ll tell you anything! Just save me!”

Yogiri grabbed the man’s legs and pulled him out. As an adult man wearing plate armor, he was fairly heavy. Yogiri managed to get him back to the clear stone ground, but it was exhausting work.

...

“You saw the stuff that grabbed me earlier, right? It’s called Seyla. It’s all over the continent. It turns anything it grabs, whether plant or animal, into an undead monster. Of course, you can’t eat it. You can boil it or burn it, but it never dies.”

-Volume 10 pages 60, 61, 62, and 63