Eu acredito que é Harry Potter e a Serpente Psíquica de Barb LP, que pode ser encontrado em FanFiction.net , e também encontrado seguindo este tweet que também confirma que é Harry Potter e a Serpente Psíquica (Crédito para SQB e ibid)
A sinopse é:
Alternate Harry's 5th yr. He gets a snake who has the Sight. Romantic entanglements, Animagus training, house-elf liberation, giants, Snape's Pensieve and more!
Há um tweet da conversa por SMS aqui:
Que é tirado do capítulo 20, "Dark Deeds"
No capítulo 31, "Legacy"
Then Harry was crying freely as he leaned against the door and thought, If only I'd read it yesterday! If he had, he could have alerted Dumbledore and Sirius to the danger Dudley could be in, Sirius could have Apparated to Dudley's school, found Wormtail, kept him from putting Imperius on Dudley...
Dudley morre pulando de um prédio:
He frowned at Harry. "Not me, Harry. Wormtail. He turned up at Smeltings. One of the teachers started keeping him as a pet, or some such thing, and then he was able to get at Dudley..." Harry's heart was in his throat. "What happened?" Dumbledore looked at Harry levelly. "He jumped off the roof of his dormitory. This morning. It looked like a suicide. We think he was under Imperius. Wormtail may be the one who put the curse on him. He's dead, Harry." Tears prickled against his eyelids. "What? But—but we'd just become friends! He—he was all right, it turned out...we were writing to each other regularly..." "And he never mentioned this rat with the silver paw?" Dumbledore wanted to know. Harry shook his head.
Harry recebe uma cobra chamada Cassandra :
Well," Harry said again, "my name is Harry Potter. It's what people call you..." he trailed off, unable to put the concept of names into words. "I thought you were called 'lazy git,'" said the snake. Harry realized she had heard his aunt addressing him. "No, no, that's not the same as my name. That's called an insult. It's to be mean. Let's see, you predicted the future and I didn't believe you, so I'll name you—Cassandra."
Tem a visão:
"If you have the Sight," Harry said to her, "tell me: will Voldemort be stopped?" "Who?" the snake hissed. "You do not understand. I can only see a few minutes into the future, and only what is right around me. I cannot predict events happening far away. And I get only a glimpse of the future; the larger a snake is the further into the future her sight reaches, and the farther distant."