You are cursed with Wereraven Lycanthropy.
Speed. You gain 50ft. of Fly speed in Raven/Hybrid form
Mimicry. The wereraven can mimic simple sounds it has heard, such as a person whispering, a baby crying, or an animal chattering. A creature that hears the sounds can tell they are imitations with a successful DC 10 Wisdom (Insight) check.
Regeneration. The wereraven regains 10 hit points at the start of its turn. If the wereraven takes damage from a silvered weapon or a spell, this trait doesn’t function at the start of the wereraven’s next turn. The wereraven dies only if it starts its turn with 0 hit points and doesn’t regenerate.
Beak (Raven or Hybrid Form Only).Melee Weapon Attack:+4 to hit, reach 5 ft., one target. Hit: 1 piercing damage in raven form, or 4 (1d4 + 2) piercing damage in hybrid form. If the target is a humanoid, it must succeed on a DC 10 Constitution saving throw or be cursed with wereraven lycanthropy.
Change Shape. The wereraven polymorphs into a raven–humanoid hybrid or into a raven, or back into its humanoid form. Its statistics, other than its size and speed, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It reverts to its humanoid form if it dies.