To use the Chalice, the owner fills the bowl of the vessel with seawater, then, while standing under the open sky, utters a word of command and drinks the contents, imbuing themselves with the Storm Aura for one hour. Invoking the power of the Chalice automatically intensifies the weather within a ten mile radius one rank (see Intensify Weather below). Storm Aura grants the following powers and abilities:
- Weather Protection - The user gains Superb resistance to any weather-based effect (heat, cold, lightning, wind). Any damaging effects caused by these sources is halved (passive effect).
- Lightning Strike - While outdoors the user may call down a bolt of lightning to strike any visible target. The bolt strikes the chosen target for Epic damage, and strikes any nearby target (10 foot radius) for Superb damage. This power may be invoked up to six times over the course of one hour.
- Vortex - The user may summon a 15 foot high, 10 foot wide vortex of screaming winds, which appears in front of them. Once summoned the vortex can be directed to move up to 90 feet per round, so long as concentration is maintained. The vortex will raise a scouring cloud of dust, flatten small buildings, and hurl objects into the sky. Creatures crossing paths with the vortex are blinded by dust and sand, are pummeled by flying objects (Good damage), and, if man-sized or smaller, are blown off their feet. Damage against flying creatures is increased by one rank (to Great). The vortex vanishes if the user's concentration wavers. A vortex may be summoned up to three times over the course of one hour.
- Intensify Weather - The user may increase the intensity of the current weather in a ten mile radius one rank for each ten minutes they spend concentrating on the task. Note that all aspects of the weather are intensified, the user cannot pick and choose specific effects. Weather will always tend towards the most destructive weather pattern that fits the current climate and season. Ten minutes concentration could turn a clear, sunny day into an overcast drizzling mess or a mild thunderstorm into a tornado bearing monster storm for example.