It is implied in the diary of Mindfang, Vriska's ancestor, that she and the Expatri8 were the previous owners of this ball, with Doc Scratch having given it to Mindfang as her "mentor", and Mindfang having given to the Expatri8 due to his void powers protecting it from Scratch's omniscience. In addition, although the cue ball always gave her accurate information, it was always phrased selectively in a way which impacted her negatively. As part of the troll's chain of revenge, for killing Aradia, Terezi revealed to Doc Scratch that Vriska was in possession of it, causing him to lose his characteristic cool and detonate it in her face, costing her an arm and her vision eightfold. In return, she performed a double psychic reach-around and forced Terezi to stare at the Alternian sun, blinding