▁stabil ized ▁under ▁her ▁own ▁vol ition , ▁as ▁she ▁never ▁showed ▁signs ▁of ▁it ▁during ▁her ▁ten ure ▁with ▁the ▁Leg ion . ▁ ▁X S ▁is ▁used ▁by ▁Bra in iac ▁ 5 ▁to ▁rev ive ▁her ▁cousin , ▁Bart ▁Allen , ▁c ull ing ▁his ▁spirit ▁from ▁the ▁Speed ▁Force . ▁The ▁two ▁then ▁team ▁up ▁against ▁Super boy - Pr ime . ▁After ▁the ▁battle ▁with ▁Super boy - Pr ime ▁and ▁his ▁Leg ion ▁of ▁Super - V illa ins , ▁X S ▁res ign s ▁from ▁the ▁Earth - 2 4 7 ▁Leg ion . ▁Bart ▁asks ▁her ▁to ▁join ▁him ▁in ▁the ▁ 2 1 st ▁Century , ▁but ▁she ▁dec ides ▁to ▁stay ▁in ▁the ▁ 3 1 st ▁Century ▁with ▁the ▁post - In finite ▁Cris is ▁Leg ion ▁to ▁locate ▁any ▁of ▁their ▁surv iving ▁relatives . ▁Her ▁friend ▁and ▁team mate , ▁G ates , ▁also ▁dec ides ▁to ▁stay ▁to ▁accomp any ▁her . ▁ ▁Pow ers ▁and ▁ab ilities ▁X S ▁poss esses ▁Speed ▁Force - based ▁powers ▁like ▁the ▁other ▁members ▁of ▁her ▁family ▁( Bar ry ▁Allen , ▁Bart ▁Allen , ▁W ally ▁West , ▁and ▁I ris ▁West ▁II ). ▁She ▁can ▁run ▁at ▁near - light ▁spe eds , ▁v ibr ate ▁through ▁solid ▁matter , ▁and ▁even ▁time ▁travel ▁and ▁cross ▁dimensions ▁by ▁alter ing ▁her ▁mole cular ▁v ibr ational ▁frequencies . ▁ ▁Equ ip ment ▁As ▁a ▁member ▁of ▁the ▁Leg ion ▁of