The Red Tide

A phenomenon in which seawater coming shoreward on the tide is tinted scarlet, from the shore and seemingly out to sea even to the far horizon. Scarlet Horizons are much feared because they herald a period of madness among intelligent creatures that come within half a mile of this phenomenon, and aberrant behavior even across creatures of only animal intellect. It is rumored this phenomenon was first recorded in PR 196 and that it has even been found in some very large inland lakes since PR 201. Curiously, Shou seem highly resistant to the effects of this Red Tide. This tide always carries magical emanations, yet also seems to be a naturally-occurring phenomenon.