The Tartarus Journal

The Tartarus Journal, often dubbed The Tartatrox, The Tartaric Journal, or the Tartaranomicon, is an Equestrian bestiary book identical to both Monstrox of Lego Nexo Knights and the Bombinomicon of TF2. Created and currently possessed by a Thestral named Incisor, a Thestral crazily obsessed with monsters, to control monsters especially should they escape Tartarus, but it was hidden away for being too dangerous in the wrong possession. Incisor banished himself into the journal and swore to come back. Eventually the Journal was accidentally uncovered by a donkey Jester named Chad Puns.