

Presumably, Snape purchased this wand in 1971, when he was eleven years old and beginning his time as a First Year at Hogwarts School of Witchcraft and Wizardry. Harry recognizes Snape's bravery and sacrifice by naming his middle son Albus Severus after both Dumbledore and Snape.The wand of Severus Snape is of an unknown wood, core material, and length. Like Harry, Dumbledore kept Snape in the dark about a number of things throughout their partnership, but Snape continued to secretly implement Dumbledore's plan even after Dumbledore's death. Snape agreed to kill Dumbledore and was aghast when Dumbledore finally revealed that Harry is a Horcrux and needs to die, though he is more upset because he still loves Lily than because he's come to care for Harry. Though Snape's hatred for Harry was genuine, he hated Harry mostly because Harry resembles James, with whom Snape had a long-running schoolboy feud. Snape then became a double agent who was ultimately loyal to Dumbledore. However, when he discovered that Voldemort intended to kill Lily, he sought Dumbledore's help to protect her and agreed to help Dumbledore in return. Snape had been in love with Harry’s mother Lily, since they were children who grew up near each other, and he got involved with the Death Eaters in his youth. Harry witnesses this, collects Snape's memories in the moments before Snape dies, and, in viewing them, learns the truth about Snape. Voldemort murders Snape during the final battle at Hogwarts, believing that Snape is the true master of the Elder Wand and thus needs to die in order for Voldemort to master the wand.

Voldemort places Snape in charge of Hogwarts and, as far as Harry can tell, Snape allows horrific things to happen to students under his watch.

Dumbledore trusted Snape, even though Snape was once a Death Eater, and Harry begins the novel believing that Dumbledore was wrong to trust Snape-Snape killed Dumbledore months before and reaffirmed his loyalty to Voldemort. Formerly the Potionsmaster at Hogwarts a greasy, cruel man who hates Harry in particular.
