User blog comment:ClariS/A Moment for Clarity/@comment-5001455-20130416002451/@comment-4881935-20130416013053

the 50% reduced cooldown would make it useful during the lanning phase, unlike how it is now, which completely sucks due to the 180 second cooldown.

Late game, it's good to help keep one champion from running out of mana, like for example, a top lane Kha'zix, or a AD carry with a strong poke.