After Being Bitten by a Snake, the Legitimate Daughter's Counterattack Turns to Evil!

Yun Zhaoling, the eldest granddaughter of Dingyuan Hou Mansion, was deeply loved by her grandfather Yun Zhengrong. She is a simple and kind-hearted person who helps the world and saves people, but she is jealous and framed by her cousin Yun Feiji, and she contracted a 'visceral disease' (actually it was a strange poison given to her by Yun Feiji). As a result, Yun Zhaoling was ruined and committed suicide by taking poison in despair! When he was about to die, he was bitten by the mysterious purple venomous snake "Purple Spirit", and the poisonous venom of heartbroken grass and snake venom were strangely fused in his body. Not only is he not dead, but: his physique has changed drastically, he is immune to all poisons, but his own blood also contains poison, and he has begun a thrilling road of revenge!