With his newfound freedom, Seeks-the-Moon had gained the ability to mask his aura, hiding his spirit-nature and continual presence in astral space from all but the most perceptive astral observer. Kyle's foci were another story. He could mask some of them, subsuming their auras into his own, but he couldn't conceal them all. So instead of being in a constant state of worry about attack from astral space, he decided to travel with the foci temporarily deactivated.