User blog comment:JmLyan/Pixia, the Faerie Queen/@comment-5686533-20140810175914/@comment-7481207-20140810205126

You cast your Q, W or E, then you have 3 seconds to press Q, W or E to get an extra effect from one of the faeries, putting that faerie on "cooldown". I don't know how else to explain it, it is basically cast a spell and then empower it in one of three ways.

For example, you just used Malice, so Malice is on cooldown. You use your E, and call Fury to cause it to deal damage, meaning Fury and Malice as well as your E are on cooldown.