Earth Needs no Eyes

You can attune yourself to minute vibrations in the earth and use them to detect the movement of others. While this Kiho is active you can detect the approach of any creature or individual that moves across the ground within a distance equal to your Insight Rank x 50 in feet. You only know the location of moving things in contact with the ground. If this Kiho is active when a skirmish begins, you cannot be ambushed or surprised by any land-bound opponent. This effect lasts a number of minutes equal to your Earth Ring.