Maybe this: refreshes the cool downs of all abilities. This lasts for 5 seconds. After the duration of this spell all abilities used have the amount of time they had left being added to the cool down. Static cool downs are not effected
So in case I worded this poorly here's an example. Lets say I'm a Zed with 50 seconds remaining on my ults cd. I pop my refresh and ult somebody in the next 5 seconds. Zeds ult goes on cd like normal After the refresh ends, Zeds ult cd has 50 seconds (the amount he had left when he used refresh) added on. Lets say during those 5 seconds i don't use my E for some reason dispite it being effected by refresh while on cd. My E goes back on cd the way it was.
Might sound confusing still so if you need clarification just ask:D