The Black Cloak can look at the ground in the Daylands and Drylands and, from the marks that shadows leave in the soil, tell if people passed recently, how many, and how long ago, up to 20 minutes in the past. If he sees the shadow of a person directly then he learns whatever name that person is currently using. If used to follow a trail the Mage gains 2+Level Tracking, even if no trail is visible.
In the Twilight Jungles and Nightlands the spell's only effect is to give a tracking bonus equal to the Mage's Level.
power+10 minutes into the past per power level