User blog comment:PotatoaDancing/Gale, The Lost Soul/@comment-25330577-20140821041922/@comment-24430045-20140821050320

Ah you're right it's not clearly written. I just assumed that since her ult costs 100 Memory, that she can have up to 100 Memory and once she does, she can activate her ult. Like Shyv's ult.