Stonebot died out through nobody worthy to fight, no champions, no worthy rivals just like the other gods. Thus rusting and becoming stiff. As time passed in it's age moss grew round it covering it, decaying it. Then one day the gods returned jura awakened and vowed to fight along side them once again. Thus concluding why stonebot is there, and jura. Stonebot, being for memorable moments re-living the past and jura being the new improved warrior with passion for fighting and blowing crap up.
On-topic: -1. I disagree with this, and think it should just be left how it is just for the point stated above keeps my imagination going and let's me live in a fake believe world. Woo for being a kid at heart.