Agile Flyer. The great cockatrice can fly in spaces that would allow a creature of Medium size to do so. While it is airborne its AC increases by 2 and if the cockatrice is subjected to an effect that allows it to make a saving throw to take only half damage, it instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.   Fragile Inner Ear. The cockatrice's balance can easily be thrown off by loud sounds. If the great cockatrice takes thunder damage, it must succeed on a DC 15 Constitution saving throw or its flying speed is reduced to 0 feet until the end of its next turn. An airborne cockatrice affected by this effect descends at 60 feet per round until it reaches the ground.   Paralyzing Gaze. If a creature starts its turn within 60 feet of the great cockatrice and the two of them can see each other, the cockatrice can force the creature to make a DC 14 Constitution saving throw if the cockatrice isn't incapacitated. On a failed save, the targeted creature is paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.