First off lets go to your Magic Stone and select Special Dungeon Of Teleportation/ Apprentice Island.
This weapon has a chance to drop from the Artifact Stealer's. They have one million hit points. These are located all over the island so becareful as you look around other monsters will attack you!Once you have found your ( Main Hand ) Warglave you will need to have (3 main hand warlgaves) for your first upgrade so farm out two more warglaves. Once you have three (Main Hand)Warglaves your ready to start your upgrading. Simply use the Upgrade Gem in your backpack ont he warglave to see the gems you need to upgrade it. It will give you the amount of gems and this amount will go up everytime you upgrade by 10 gems. And the amount of Main Hand Warglaves will go up once you hit about @ 8.
At this point we will use our Magic Stone and go Special Dungeon of Teleportation/ Emerald Forest.
Since your new here just follow the flags and they will guide you to the monsters.
There will be many kinds of monsters but they will all have 1 million hit points.
Once you kill them they have a 100% drop rate for the gems you need to upgrade your warglave.
Just farm these out and your warglaves from Apprentice Island untill your @10 Warglave is finnished!