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RENOWNED SPAWNS AND HOW THE WORK
Renowned spawns are like a mini champion spawn. They are progressive spawn system. Which means you must kill a certain amount of creatures, in order to progress your way to the champion. In this case, the Renowned creature. The spawn can have various levels of creatures. Once you go through all stages of the spawning system. You will invoke the spawn of the Renowned Boss. Once you kill him, the spawn will restart in a given amount of time back at beginning.
Take note that the spawn levels must be cleared in a given amount of time, if they are not completed by this amount of time (which is between 12-15 minutes). The spawn will go back to the previous level. Below is a listing of the Renowned creatures and what spawns on each level. I will also list the items they drop.
Renowned Fire Elemental
Items Dropped: Jade War Axe (http://www.uoguide.com/Jade_War_Axe)
Level 1: Lava Snakes
Level 2: Lava Lizards
Level 3: Fire Ants
Level 4: Efreets
Level 5: Fire Daemons
Level 6: Lava Elementals