Blackthorn font (Scriptorium Library). Click on the font picture to buy the font.
Blackthorn draws on the tradition of Art Nouveau font design with some elements of western or circus style fonts, but an overall effect which may have more in common with the psychedelic era than anything else.
It has a feel somewhat akin to some of the lettering of Alphons Mucha particularly the Abaddon and Gehenna fonts. It’s very stylized and kind of wicked looking.
You can see where the name comes from if you note the thorn-like spurs on the upper part of each character.