I Married a Disabled Tyrant After Transmigrating

Mu Wanwan transmigrated into a novel.
And became a cannon fodder side character used to counteract the disabled tyrant's ill fortune.
The tyrant is a huge villain. He challenged the leader of the seven tribes alone and had been beaten into a vegetative state.
The original character lived in the tyrant's territory. Her parents, who were greedy for power, randomly made came up with compatible bazi* and sent their daughter into the tyrant's manor, turning her into a wife to ward off ill luck.
Also sent off together with her was a little white flower maidservant, who was the heroine of the story.
The original character and the heroine agreed to escape together-but the original character was stabbed to death that very night.
And just as they were about to implement their escape plan, she transmigrated over
Mu Wanwan: "..."
What a horrible script!!
In order to live, she had to do her best to take care of the disabled, comatose dragon. Three years later, she actually turned the tragic story into a sickeningly sweet love story.
Note: *bazi: A Chinese astrological concept that a person's destiny or fate can be divined by the two sexagenary cycle characters assigned to their birth year, month, day, and hour.
**Not my story. Source: MTLNOVEL.COM. Author Mu Mu Liang Chen. For offline reading purpose