Mercurial Extortionists. Ccoas frequently use their powers to humble the efforts of civilized folk by sweeping through fields and villages and demolishing homes and crops. Mortals can attempt to appease a ccoa's malicious behavior by presenting it with offerings and gifts; however, ccoas are mercurial creatures that may as graciously accept or violently reject an identical offering from one moment to the next. Some may ask for precious metals, incense, or wine, while others demand obscure items like a couatl feather or a baby's tears; rarely can mortals simply guess the object of the ccoa's desire. Failure to deliver the offering earns the ccoa's wrath, but if the gift is delivered before sunset the following day, the ccoa grants its boon, such as exposing an enemy's weakness, aiding it in combat, blessing a harvest, influencing the weather, or revealing an unknown location or forgotten secret.