I'm searching for a movie , I can only remember the last scenes.
It's a black female and she turns into a monster with wings, the monster lands the top of a building and turns into stone when the sun rises

Sounds like the final segment
Within the movie

Tales from the Darkside
Lover's Vow

A down on his luck artist is nearly killed by a monster in a dark alley, but is spared by his promise to never
Mention the monsters exisitence to anyone else. Immediately after his near death encounter he meets
A young woman who inspires him and soon he's discovered and he becomes a success and soon afterward they wed. He's still haunted by the memory and one sleepless night while
Alone he draws the monster. His wife sees the pictures and shrieks"YOU PROMISED!!" and transforms into the monster. His promise was been broken. She takes his life with a single swipe of her talons, and goes back to her perch as a stone gargoyle outside his city apartment

Thank you very much !