The blind archer xacharia only tells you stuff that you will learn by the end of the game from dakkon and morte but he does give you his liver and his heart. Heart gives permanent +1 dexterity and the liver can be used when ignus is teaching you spells. Cant read graces diary its just one of the many loop holes left when they shipped the game early. I think you have to had solved the rule of three earing puzzle and have a high enough intelligence then tell him to make pyramid shaped bolts. The mechanical wizard will fight you even if you have 25's in all stats no way to get around it. If you kill many as one and you have a low charisma the retarded guy will morph in to a wererat. All the other factions suck anyway stick with the godsmen and entropy blade is the second best weapon next to trias the deva's sword. Go here for more planescape:torment information
http://www.gamejag.com/planescape/index.htm
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BOW TO THE BISCUIT KING AND HIS THRONE OF SCONE!!!