Talk:Cassiopeia/@comment-10891982-20140905001717/@comment-1330314-20140905002110

The stacks on Cass's new passive are permanent. I think it's designed so that, on average, Cassiopeia can hope to reach full stacks by the late game if she does even moderately well, but the way the milestones are placed means that her opponent can delay her power spike by bullying her in lane.