A great many people are intimidated by Stympahlide' piercing gaze and the grating screech of its copper wings. However, the most repellent thing about it is the toxin it secretes from its body and spreads wherever it goes. Shunned by humans, (the beast?) fled deep into the forest to live in what abandoned villiages [sic] it can find. But after enduring so much ill-will all its life, something's got to give...
The Ornithes Stymphalides (or Stymphalian Birds) were a flock of man-eating birds which haunted Lake Stymphalis in Arkadia. Herakles' destroyed them as his sixth labour, employing first a rattle to rouse them from the thick vegetation of the lake, then shooting them down one by one with bow and arrow or a sling.
The birds may have been placed amongst the stars as the constellations Aquila and Cygnus, which sit on either side of Sagitta, the arrow of Herakles.
The Stymphalides were sometimes identified with the arrow-shooting Ornithes Areioi (Birds of Ares) encountered by the Argonauts in the Black Sea.
Source: Theoi Greek Mythology 
- Could be drawn from the token card pack during Battle Royale VIII.