In the food chain of Monsters, Steelback Bears are not at the top but at the lowest level; however, they are one of the most powerful monster beast races on the First Floor.
Thanks to the armour around their body, their defence is incredible to the point, that they would be considered number one among the monsters on the First Floor.
Moreover, they have powerful attacks like [Steel Claw], [Iron Charge], and [Bear Fury].
Another important reason for selecting these Steelback Bears for his Third Resident Monster was because of the Beast Evolution Crystal in his hand.
Previously, when he offered the Metal Scropion's Corpse to the Grimoire of Life and Death, he received a Beast Evolution Crystal of the metal attribute.
Later, using the [Crystal Copy], he cloned two Beast Evolution Crystals which he sold to the Royal Servant in the Celestial Pagoda, leaving him with one Beast Evolution Crystal.