So... you know those rare times where Crota hops up early and goes straigt up berzerker on the guardian running sword?
I bet someone in the tower kicked the purple ball at that exact moment....
Crota does sound a lot like scrotum.
And now we know where the purple ball is from....
I bet Eris took it from him.
English
#Destiny
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The energy the ball holds is from all the fallen guardians that died trying to glitch on top of the pillars by the vaults at the tower.