Beginning at 3rd level, you can use your action and one spell slot to focus your awareness on the region around you. For 1 minute per slot level you expend, you can sense whether the following types of creatures are present within 1 mile of you (or within 6 miles if you are in your favoured terrain: Abberations, celestials, dragons, elementals, fey, fiends, and undead. This feature doesn't reveal the location or numbers of these creatures.