Talk:Xerath/@comment-46.75.216.185-20111003180413/@comment-1663285-20111004162025

^You cast it and recieve the effect for about 8 seconds, then when it ends you gain the bonus MS, but you retain the option to cast it a second time before the duration is over to end it instantly. At the moment, the max rank cooldown is about 3 seconds from what Xypherous has said. So think of it like Monkey King's ulti in how it operates.