Reduced Threat. A reduced-threat monster takes a −2 penalty on attack rolls (included in the stat block), ability checks (included in the stat block for skill proficiencies), saving throws (included in the stat block for saving throw proficiencies), and saving throw DCs (included in the stat block).
Dive Attack. If the peryton is flying and dives at least 30 feet straight toward a target and then hits it with a melee weapon attack, the attack deals an extra 9 (2d8) damage to the target.
Flyby. The peryton doesn't provoke an opportunity attack when it flies out of an enemy's reach.
Keen Sight and Smell. The peryton has advantage on Wisdom (Perception) checks that rely on sight or smell.
Multiattack. The peryton makes one gore attack and one talon attack.
Gore. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:7 (1d8 + 3) piercing damage.
Talons. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:8 (2d4 + 3) piercing damage.