This ability makes your mount sniff or see Power Crystals in a wide range.
First the chance to find one is around 10%, but you can increase this chance to 20%. (That are 20 levels with each additional 5% of your 10% basic chance - with 8/20 you will have a chance of 14%).
These data is experienced data from the german server Ferono. I hope it's correct here, too.