First mention Edit
In the Bar Khu Mountain range (vol 3 chap 1), in between Rosenheim Kingdom (south part) and the United Kingdom of Briton (East part).
Second appareance v5c7
"These monsters looked like lizards". v5c7
It's level is over 200.
Special skill Edit
( but no deadly gaze)
More data Edit
Some 2nd tier magic user have an habit to summon them and use them as hunting pet. v5c7
(example the half elf Summoner Seirin v5c7)