The monster reached him in almost no time at all, Lewis jumped to the side as one of it's pointed spearlike legs descended towards his head and instead made a deep indentation into the ground, Lewis quickly decided it was kill or be killed after he saw that the spider had lay a wall of web around their battleground, presumably so he could not escape and so no other predators could enter, Lewis jumped at the monster grabbing onto one of it's back legs, he bit into its joints to try and detach one and slow it down to give him more time to figure something out while the sharp edge of the monsters natural armour and found he could not even scratch it while trying to bite through it's trochanter.

Lewis was flung from his place on the spider's leg by another leg hitting him from the side and severing one of his back legs from his body, Lewis let out a shriek of pain but managed to get back to his feet, and dodged strikes from the beast over and over again until finally his legs fave way and the monsters front leg came down impaling him through the back, the creature's fangs struck down into his neck area shredding the body and Lewis felt like what he imagined the airbag of a car to feel like as he was ejected by the body.

His bodiless spirit flew from the marred form of the wood mouse and curved around with fury etched onto his face Lewis grabbed the soul of the beast before ripping it from the body causing the beast to stiffen up and let out a horrid screech before dropping to the floor lifeless, it's blood red eyes now a milky white.

Absorbing the soul Lewis relieved 46 years as a giant spider, from escaping the egg sack to attacking humans who enter its cave and then he learned the beasts skills

skill learned: poison manipulation

the ability to manipulate the potency ans contents of poison as well as create it in  the body and manipulate its properties.

skill learned: silk weaving

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the ability to produce and manipulate silk from the body

Lewis let out a small (the best a spider could) at the realisation that he would have to learn to walk and move around on 8 legs and not just that legs without much surface area on the ground, it would be like walking on 8 flexible sword/spears, it took him a few moments before he managed to stand up on all legs, and about half an hour to walk around though falling over was a common occurrence, as soon as he figured out what he was doing to a decent extent he moved to his tunnel and realising that he was much too big to fit at the moment he let out a scream of frustration.

Digging with the arachnid legs was a lot more difficult than with the mouse limbs though after using his dig skill it was much much easier, and the entrance was now a lot bigger than it once was being the size of which he would easily be able to drag a cow into it, he  worked himself to exhaustion renovating his tunnels and other exits, they were all much bigger now and while that meant more and bigger things could get in he had created more exits and moved his main 3 chambers further down though he had a plan for them.

After resting through the night Lewis woke up in a terrible mood at the thought of having to get used to a new body, he quickly tried to learn about his new skills finding the ability of producing web and getting his poison to come out of his fangs easy, it was instinctual like you would not need to learn how to take a piss or spit, he automatically knew and quietly thanked the gods for his ability to absorb memories and experience.

After getting a hang on his new abilities Lewis began lining the walls and floor of the tunnels with webbing, all of it leading back to the main chamber, they were made so that if a foot was stepped on even one thread or just one was destroyed than he would know about it. Lewis then decided to go hunting, while he could wait for a creature to helplessly wander into his tunnels and eat that he decided he would rather find something to eat now and then he is assured sustenance.

-

Lewis sat  on his soft silk bedding, the underground home was dark, with no light inside but due to Lewis,s night vision he could see perfectly, though everything had a green tint.

Lewis gorged himself on the carcasses of killed deer he had found hunting in the forest, he had gotten  few skills from them, after learning to absorb their souls while inside a body, it took a few hours of toying around with a crippled doe to figure it out, Lewis had gotten the passive skill trample that gives +25% damage while trampling and from a buck he gained the passive skill charge that adds +25% speed when charging, predators he had come across out there were owls, wolves and a bear, even though he had not tried to fight one yet, Lewis also saw a few short humanoid figured vaguely while in the forest but they were quite a distance from him so he couldnt see them properly and they were in rather large numbers, also he was quite tired after hunting for the day at the time so he didn't want to investigate it, but he assumed there is probably some humanoid species village or town around somewhere near, though he could be wrong it was worth looking for.