https://2img.net/r/ihimizer/f/pixy.png/
An extremely, extremely rare result of fairy/elemental "mating" rituals, the dreaded Sluagh are born when the magic used in the hybridization process is somehow tainted or flawed in some way,which causes an impressive and dangerous explosion of energy before congealing in a warped, twisted new life.
Biologically, magically and mentally unstable, a Sluagh spends the entirety of its ephemeral existance as a raging engine of wanton destruction, unleashing magic attacks of inmensely devastating power towards anything it stumbles upon, carving a path of ruin wherever it goes, and absorbing the magic in the environment like a ravenous vaccuum to sustain its burning metabolism. Absolutely unpredictable, they follow erratic and mindless patterns in their rampages, and their abilities can wildly vary depending on their "parentage". To the relief of about everything else in Felarya, these hybrids only last a few hours at best before their unstable organisms collapses on itself, and the Sluagh tears itself apart in suicidal madness or simply crumbles into smoldering, crackling cinders.
A Sluagh doesn't appear to feed or even breathe, and its skin is charred and oddly cold to the touch, with a smell like sizzling rubber.