Magical Feathers. Firebird feathers are prized throughout the mortal world; occasionally, the creatures bestow feathers upon those they favor. Firebirds also seed hidden locations with specialized feathers, which burst into full-grown firebirds after a year. As the creatures age, their feathers' light dims, but this occurs gradually, as the creatures live over 100 years. Firebirds stand three feet tall and weigh 20 lb.