Peryton

Perytons are twisted and depraved magical creatures that appear to be a cross between a giant eagle and a demonic-looking, fang-toothed stag. They are known and feared for tearing the beating hearts from their victims' chests.

A peryton's feathered and winged body is about 7 feet (2 meters) long and 5 feet (1.5 meters) tall, and is similar to that of a giant eagle with dark green or gray-green feathers.Its head, however, is covered in blue-black or purple hair and is roughly the shape of a deer's. Its maw is full of jagged fangs, and its talons are as sharp as razors. On the top of its head rests a set of extremely sharp and strong antlers, which are as hard as steel and jet black in colour. A male peryton has light blue chest feathers, while a female's are pale brown. A peryton's eyes glow or glitter and are an orange-red color.
Whatever fell magic created perytons granted them a deceptively strong hide that is nearly impervious to anything but magical weapons.
They are not often encountered by people, as the Peryton are rather reclusive, but many know them from old wives' tales as human-shadowed monsters luring people to their deaths with cries of agony.

Origin of the Perytons, according to Dawnseeker Salvia

 (not necessarily believed to be true, but a fun little campsite story nonetheless) "As punishment for their crimes, the perytons were cursed by five gods of law. Lathander, god of the dawn, said "You have been swift as an eagle in your flight from justice, so I curse you each of you with the body of the eagle." Mystra, goddess of magic, said "Fierce as a wolf have you been in your persecution of the innocent, so I curse you with the teeth of the wolf." Torm, god of duty, said "Foolish as a stag in rut have you been as you shunned what is true and good, so I curse you all to bear the head and horns of the stag." Ilmater, god of suffering, said "You have tormented and torn heart and soul from your victims, so I curse you with unnatural appetites, so that you may only live and prosper after devouring the hearts of your prey." Finally, Mielikki, goddess of the forest, said "While you acted as beasts, your heart contained evil which only humans can know. I curse you to always cast the shadow of the humans you once were, to always remind you of your terrible deeds and of the souls that you have lost."
Thus, they became the perytons. This tale is unsupported by fact, but it does explain all their unusual human traits. However, some considered it ironic that their curses, particularly that of Ilmater—who aimed to shield folk from suffering—only drove the peryton to further murder and savagery. This cast doubt on the tale, or on the wisdom of the gods”