A's version of Thunderspire
The fine grains of this silvery powder can reveal the subtlest tracks. – Level 9 power – Standard Action. The tracking dust creates a zone of 5 contiguous squares. In areas where the dust is spread, Perception checks to track can be made with a total +7 bonus; use this modifier instead of your normal check modifiers. Tracking dust can be determined with a DC20 perception check, and its effects last for 1 hour.