From the demi lich knaxx, in the docks destrict...
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You have to find the golden pieces of his body, the he comes alife, and if you kill him, he wil transform in the demi lich, a petty tough fight!, and if you pause the game when he transforms in the demi lich, you can take a ring, and if you kill him the second time, you can get an another ring
Tip : Use the Mace that kills undead(I forget his name)