Omen

The Omen is a uniquely unclassified being. Taking the shape of large hounds, they appear to people some time before particularly destructive events, seemingly foreshadowing them. They will take no action during these appearances other than to stare at those unfortunate individuals from afar.

All appearances occur in darkness without fail, and an Omen is known to oftentimes appear shortly after a thick fog shrouds the immediate area. An Omen will appear on the edge of the vision of people in these poor visibility conditions, and viewing them is said to have adverse effects.

Biology
The Omen appear as large, shaggy black hounds between waist and shoulder height on an adult, with a glint of intelligence to their eye. Such sightings are brief, given that a person observing an Omen will experience temporary blurring or even loss of vision. Thankfully, this change is not permanent, and full vision returns soon after such an encounter.

Sociology
An Omen will appear to small groups on the edge of their vision, and will not directly interact with them beyond staring. They will vanish if approached or attacked, as will any fog brought by the Omen. This behavior has led to some doubt as to their intentions in appearing to people - whether they cause the disasters, foreshadow them, simply wish to witness events out of curiosity, or a myriad of other reasons. Whatever the case, they never interact with those they appear to.

Trivia
The appearance of multiple Omen at once has never been documented, it is possible that is because an event resulting from such an appearance might be catastrophic to all involved.

Any mentions of Omen occurring in journals and books use Omen in both the singular and plural senses.