To easily beat shiva buy a fire rod and have a black mage with fira.(frost rods and black magis fira can be bought in karnak). Get to shiva in the walse water tower witch is located in the castle. Talk to the green orb with fire in it. This is shiva. make sure the person with flame rod is first to attack and the person with black magic fira the second person to go. Select ITEMS with the person who has fire rod and go up one. Select fire rod and it will kill the ice soldiers and badly hurt shiva. After this use fira on shiva and it will kill her. Have fun with your new
summoned monster!