I think its from the MEGA Driller at Voltabolts challenge.
its really rare
None you get a battle core at crsoc
at dr voltabolts quests. do the quest around 20 times anc you have a chance
click travel then do doctor voltabolts challenge and get 15 scrap metal and battle core from the quest thedragon
You must purchase the superior battle core from cysero at his shop for for 25 dragon coins.you can get a battle core from the quest in dr. voltabolt and keep doing the quest until you get either a battle core, or you can get filament.
At the dragonfable Website
137382
You go to Dr. Votabolt's Challenge and press the button and battle and sometimes you will get it
What privateserver anyway all of them are good.
RuneScape and DragonFable are different games. You won't find on of them "in" the other.
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you can find it on your underwear