Umineko no Naku Koro ni Timeline (Miracle fragment)

The miracle fragment timeline is the only depicted timeline in which Lion Ushiromiya exists. In any given fragment there is a $1⁄2,578,917$ (.00003878%) chance that Sayo Yasuda will be accepted by Natsuhi Ushiromiya as her child and become Lion Ushiromiya. Bernkastel travels through an untold number of fragments in order to discover this one.

Major differences
The largest difference in this timeline is the existence of Lion Ushiromiya. Natsuhi accepts the child she is given by Kinzo and raises it as her own first child. Lion grows into a near-flawless youth and becomes the next successor to the Ushiromiya headship. This succession is generally accepted by the rest of the family and removes the otherwise long-held tension between Krauss and Eva Ushiromiya over who is the more fit successor. The succession also lifts the weight and responsibility of the main family branch from Jessica's shoulders, allowing her to live her life in a more free manner.

Furthermore, Lion Ushiromiya cannot exist concurrently with Beatrice. As such, when Lion exists, Beatrice the Golden Witch does not.

However, this timeline ends the same way as the truth timeline, with Kyrie and Rudolf killing most of the family before being killed by Eva.

The Rokkenjima masssacre
After the Ushiromiya family arrives on Rokkenjima, Kinzo orchestrates a funeral for Beatrice. Later, during dinner, Maria delivers Beatrice's letter. Upon reading the letter, the adults of the family spend the night attempting to solve the witch's epitaph. After much excited theorizing and search, the adults solve the riddle and discover Kinzo's hidden gold along with the existence of Beatrice. Beatrice explains that the island is rigged to explode from WWII-era bombs and, had the adults not solved the riddle, she would have flipped a switch on a grandfather clock which would destroy the island at midnight. Beatrice tells the adults that the switch is currently in the "off" position and that the island will not explode. The hysteria from discovering the gold along with a growing mistrust between the siblings turns into a mistrust of Beatrice and the adults argue amongst themselves about whether the switch is actually in the "off" position and whether the family should flip the switch or leave it be. The conflict becomes physical and results in Eva accidentally shooting Natsuhi, killing her. In a rage, Krauss attempts to wrestle the gun away from Eva. Hideyoshi intervenes and the struggle again results in a shooting, with Krauss falling to the floor dead. Eva and Hideyoshi protest the remaining siblings' accusations of murder until Kyrie defuses the situation. During the short moment of calm, Kyrie shoots and kills Rosa because Rosa was the only one with a bullet still in her gun. Kyrie, who has experience with the Winchester rifles, quickly reloads her weapon. She and Rudolf kill Eva, Hideyoshi, and Beatrice. Kyrie and Rudolf quickly kill the five servants working that day and call the children in the guesthouse, tricking them into leaving the house one at a time under the guise of a special test prepared by Kinzo. The two kill Lion, George, Jessica and Maria. Kyrie, after killing Jessica, walks through the rose garden and comes face-to-face with Eva, who narrowly avoided death due to the low-firing nature of Kyrie's gun. Eva manages to kill Kyrie and later kills Rudolf in the chapel. Eva escapes to the Kuwadorian as the island explodes and returns to Japan as the only survivor of the incident.