fully grown adult wolf spiders are actually significantly much LARGER than what we have now.
they are about the size of a human hand and are big enough to carry tiny spiderlines on its back.
So this got me thinking what if they added a fully grown adult wolf spider as a boss with spiderlines on its back somewhere in the shed? Considering the spider is so big you have to use the environment in the shed to squish it rather than attack it directly with your weapons. As it sends spiderlines after you.
It's funny if you think about it, the wolf spiders we have now are already the largest most powerful insect and yet they are far from their potential adulthood massive size.