User blog comment:JmLyan/Divira, the Spirit of Magic/@comment-5433392-20131023212015/@comment-7481207-20131024162755

The cooldown reduction is not normal cdr, but rather a direct reduction of the cooldown like Nautilus anchor when it hits terrain and Hacarim's rampage reduction on consecutive casts. Since this kind of reduction is of the post cdr cooldown rather than the base, that means with 40% CDR and maxed E, the actual cooldown reduction of Q inside the field is 64%, which makes the cooldown about 1 second.