Bandit Spider is an optional Boss. To fight Bandit Spider, learn "Digging Champ" from Onigiri Sensei. Then, go to Ryoshima Coast. Go past the Monk Temple and follow the trail. There will be an area when there are two brown cows and a calf. There will be a rock surface for you to dig at. Dig there, and a hole will appear that has a purple mist coming out of it. Go into it, and you will be able to fight Bandit Spider. Bandit Spider is a lot like Spider Queen, except it attacks more often by throwing energy balls. Draw three lines to his spinnerets, then attack the lamps. Also, when it starts spitting out a metal sac (with a fuse on it), draw a line form the fire to the "bomb" and you can attack the lamps again using the same method. Continue doing this to defeat Bandit Spider.