Quistis' Shockwave Pulsar (one of the few moves capable of inflicting more than 9999 damage in a single hit) is obtained from Dark Matter, an item which can be acquired by using Siren's Tool-RF on 100 Curse Spikes when Siren is at level 100. Shockwave Pulsar is one of Griever's moves, but Quistis uses it as her most powerful (in terms of damage, not status effects or instant kills) Limit Breaks.