This sentient being recorded its thoughts in a daily journal for the duration of January. According to its entry for Monday 4, its plans involved waking up, vomiting, and performing maintenance on its tail. On Tuesday, it intended to emerge from its cave, locate and consume Gragg and Lerk, set fire to a tundra, and utilize its tail to fell trees. The following day, it desired to drop rocks from above, consume the contents of Mook Pits, capture and devour a family of Ack-platts, then regurgitate, play with, and re-consume a baby Ack-platt, and finally scrape against a castle wall.
On Thursday 7, its agenda included incinerating two villages inhabited by peasants, eating the stomachs of snack-donkeys, attending vocal training, consuming the instructor, and drinking from an algae-filled pond. On Friday, it aspired to engage in wrestling with, and possibly consume, Duke, then return home, add mud to its sleeping area, groom its tail, scratch its battle scars, and then sleep.
This creature's existence was first documented within Monsters and Aliens from George Lucas, a 1993 publication. Leland Chee, an employee of Lucasfilm responsible for maintaining the Holocron continuity database, has stated that the information presented in the book is considered non-canonical.
Ultimately, this creature made an appearance on screen in the film Willow, where it was known as the Eborsisk. The name was created by combining the names of film critics Roger Ebert and Gene Siskel.