This flying insect is 2.5 meters long.
The intelligent cal then can attain a length of 2.5 meters (8 feet). It has huge mandibles that can do massive damage and, given time, crush even duralloy. It is attracted to bones, which are its favorite food. It carelessly rips the flesh off living creatures merely to devour their bones. The cal then is completely resistant to all heat and cold attacks.
Large beast (mutant)
Armor Class 11 (natural armor)
Hit Points 27 (6d8)
Speed 20 ft., fly 20 ft.
STR | DEX | CON | INT | WIS | CHA
14 (+2) | 10 (+0) | 10 (+0) | 13 (+1) | 18 (+4) | 4 (-3)
Damage Immunities fire, cold
Senses darkvision 60 ft., passive Perception 14
Challenge 1/2 (100 XP)
Ripping Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 8 (2d6 + 2) piercing damage. In addition, nonmagical armor worn by the target is partly shredded and takes a permanent and cumulative -1 penalty to the AC it offers. The armor is destroyed if the penalty reduces its AC to 10.