In year 5000, or what you'd call the modern day, Tartarus, the prison of beasts and strong adversaries, shook. The Firebird, a coveted fowl of legend, has escaped Tartarus into Equestria. The Guardians of Tartarus take their move.
Credits to @SucreSkull on Twitter for the avatar! Follow her!! ~~ Just your friendly neighborhood FIMFiction writer that goes into your pantry and devours your Reese's Puffs. Editors welcome!