Killing it will give you 430000 XP.
Respawns on average in 350 minutes.
You see Arachne, a horrid half woman half spider. With so many legs she can hit you very fast, and her poisonous bite is fierce.
Drops between 2000 and 10000.
Drops between 1 and 3.
Drops between 1 and 2.
Drops exactly 1.