|I like how the horse is all "FUCK. THIS."|
In a very knowing tribute to classic horror films - which Kirby's Demon may have been in more than one way - the yellow-skinned Etrigan takes on a werewolf-like Transylvanian terror called The Howler in The Demon Vol.1 No.6 (February 1973).
Traveling through the legendary land of monsters and menace in order to tackle "the spawning ground for every danger unleashed by occult experiments," the Demon's alter ego Jason Blood disguises himself as a callow, souvenir-buying American tourist. When the rest of the patrons of a homey, old-style feudal tavern start bolting the doors against the ominous wailing of The Howler, Blood darts off through the front door. "That's right folks," he tells the assembled throng, who gasp in shock and horror, "I've purchased some supplies and a good horse -- and now I'm on my way back to the U.S. of A." Tsh, tourists.
The Demon defeats the Howler that night in Transylvania, but unknowingly carries the spirit of the supernatural beast back to the States, which is also why you don't bring fruit across state borders.
After the cancellation of The Demon, so many of the monsters and menaces which Kirby invented disappeared with his departure. Not only the Howler, but also Mannikin, Ugly Meg, the Master Eye, the Phantom Farley Fairfax - and another half-dozen monsters and secret cults which could have dramatically livened up an often moribund shared universe. In fact, with the exception of Morgaine LeFay and Klarion the Witchboy - often reserved for homages to Kirby - the only creature I can recall ever finding his way into another DC title was Alan Moore's take on the Fear Thing.
It's a shame, because everything about the Howler, in particular, is a winner - he's got a great visual (his lower fangs curling like bull's horns is a striking design element, and his ape-like frame just bursts with power) and he's an almost-unbeatable foe by dint of his supernatural component. This is why my preference has been, for years, that the next time they reboot the DC Universe they start with all the Kirby inventions and build offa that.