So I'm A Spider, So What?, Vol. 3 by Okina Baba

Thrown into a hostile labyrinth as a lowly spider, the sarcastic, quick-thinking protagonist fights to survive by exploiting game-like abilities, evolving and mastering new magic and tactics. Each deadly encounter forces inventive strategies, unexpected alliances with other creatures, and brutal growth that reveal creeping hints about the wider reincarnation world and the mysterious forces shaping the fates of other survivors.

Purchase from Bookshop.org