Image: David Malki!
Precise language is the hallmark of intellectual refinement, which is why it's important to know how to phrase the pluralizations of the supernatural creatures that you encounter on a regular basis. For example, a multitude of yetis is a "flurry of yetis" and more than one nymph is a "delectation of nymphs". David Malki! (his name is spelled with an exclamation point) of the webcomic Wondermark has a comprehensive guide.
Link via io9