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----Elder Sword

Xenia suggest you look inside the temple of The World Wakes, at this point, you should be able to venture in the start of the area, where on your right when you entered for the first time was a sword, you picked the pieces and bring them to Linza, she will tell you this is simple steel, there's nothing great about the sword except elfic language. It seems older than the regular elfic language from what she said, since she ahd to engrave sometimes some symbols for elves that wanted to try a sword.

NOTE : Right now you may think, why the hell is there elves symbols on a fake sword in the place of the sword of Guthix...at Guthix's place? Bunch of people thinks Seren was in fact Guthix's wife, think like this, Guthix wanted to make sure this sword would never fall in the wrong hands, right? He asked Seren to find a way to hide it as well as possible, just so no one finds it. She would have dispatched a team of the most loyal elves she has to hide the sword behind a puzzle, that would make sense now.

Going to Isafdar(Elves Kingdom), you'll need to speak to Arianwyn, tell him you need to learn what are the symbol's meaning after showing him the sword, he will tell you that what it means is : "This one is a fake, the real one is below". He will then say that he knew a day would come this would happen, as his ancestor was one of the team that Seren dispatched to hide it, and only someone with who he has complete trust would have received this information as only his bloodline knows that kind of elfic, as it's an older dialect.

Heading back to the temple, do not forget the sword, you will see the chest, try to open it, despite your greatest effort, you see that you cannot open it with strength alone, there's a keyhole in form of a circle, a tiny one. Look around the room,at one spot should be a small, rectangle-like deep carving in the wall, using the sword on it will unlock the puzzle.

A puzzle looking alike with the puzzle of "Within The Light", a beam of color will start being projected, this beam will have to hit a tiny keyhole, similar to the one of the chest(with a corresponding color). This will unlock the next beam of color that you will need to guy to the 2nd keyhole(which may require a blend of both), a third beam will pop up, which you'll need to fusion all color(Red, Blue and Green) together to make a white beam of light, this beam of light will unlock the chest as it requires white to be unlocked.

Once you unlock the chest, you will see the sword is in pieces but it looks pretty sharp, even with the time it spent laying inside there. Take the sword, after taking the sword, bring it to Linza. She will tell you this is a metal she never saw before, but there's an enchantment on it preventing it from being reforged. Take the sword to Ariane, Ariane will tell you she can help you, but she lacks the ingredients, after all it's an enchantment that a god has placed on his own weapon to make sure no one could use it without considering the balance first. 

The first item was a part of the body of Guthix, as he is the god who has enchanted the weapon to disolve it. You need to grind it, then by using it with a regular tea, it will create a mixture, get this mixture to Ariane. Ariane will enchant the tea, then shower the sword parts in the mixture, disenchanting the barrier Guthix had put into place.

The enchantment gone, you can head back to Linza to reforge the Elder Sword, once it's done, Xenia will teleport next to you and take it from you, saying she'll take care of it until you get all 3 weapons. The next item is the Elder Bow, Xenia said, I believe there's a lot of things to kill to get to it, sadly. Maybe Ozan has informations concerning the bow?