Head over to OSRS gold the Grand Tree and Request the shield. Narnode will sadly say that it has been stolen! When the converstation is over, he earns a level 100 Ogre, and 2 level 37 assasins to try to kill you. Kill all three of these and go down the steps to Glough, who is currently attackable. Attack him as he's only level 28 and will just attempt to kick you.
Now, talk with Arrav, and he will let you repeat the process with Wally's revival. So again, visit the Magic Guild, and have all your runes prepared along with each of the seals, the defense and the team. Use them to rekindle all 5 of those extraordinary souls and a bright light will shine in the room as Guthix, Armadyl, Zamorak, Saradomin and Arrav look before you. The gods work together and even revive Bandos!
All provide you access to a single, grand weapon, which isn't yet complete. They give you the Unfinished Godsword. They tell you to enchant it in the abyss, and you are going to have the ultimate weapon, The Abyssal Godsword. Head over and to the Tree Gnome Village, where the final battle will occur following your army has defended everywhere else and attacked all the additional needed places.
Again, wear your elitist armor and start the battle. Avenge all the souls that expired and be ready for the last battle. After that, restock for buy RS gold the final battle, the conflict with Zamouregal.