i skipped shadow and light and make a forest one :)
it has 2 forms, the first is small and weak, it has wooden armour and he can root his legs into the ground and make tentacles shoot upwards
clicky
the second one as you can see below is 100x more badass and is loads bigger (the other spider is about as big as this ones claw thing), the tentacles from his legs turn into venom shooting spikes and instead he has 100s of tentacles hanging from his head.
the tentacles can now go into the ground, swing at you or leave the spider as separate enemies.
btw both are meant to have 4 legs