How did Severus Snape die in Harry Potter and the Deathly Hallows?

Answer 1

Although Voldemort obtained the Elder Wand from Dumbledore's grave, he was unable to use it properly. Believing that the only way to wield the Elder Wand was to kill its master, he ordered Nagini to kill Snape, whom he assumed to be that master.

Fatally injured, Snape gave up his silvery memories to Harry, who had been concealed nearby. The memories revealed, through the Pensieve, that Snape was motivated by his lifelong love for Lily Evans (Harry Potter's mother), and loyalty to Dumbledore ever since Voldemort had decided to go after the Potters.

After Voldemort ordered Nagini to kill Severus, Snape's last request to Harry was simply: "Look at me", because he wanted the last thing he saw before he died to be Lily Evans's eyes. This proves that Snape loved Lily until the very end, seeing as how Harry 'looked so much like James, but had Lily's eyes'.

During the final duel between Harry and Voldemort, Harry revealed to Voldemort that Snape had been, in fact, Dumbledore's man. Harry also revealed that Snape was never the true master of the Elder Wand, because Snape never defeated Dumbledore; the two had arranged his death. Draco Malfoy disarmed Dumbledore (who was the master of Elder Wand) before Snape killed him. Therefore, Draco was the true master of the Elder Wand, not Severus Snape. However, Harry had overpowered Draco at Malfoy Manor, so in actuality, Harry was master of the Wand. Snape's true loyalties remained hidden due to his skills as an Occlumens and the fact his actions were motivated by love, which Voldemort neither understood nor cared about.

Albus Severus Potter, the second son of Harry, and the only one of Harry's children to have inherited Lily's eyes, is named after Snape. When Albus was worried that he may be sorted into Slytherin, Harry responded that Albus was named after two headmasters, one of whom was a Slytherin and who was "probably the bravest man I ever knew."Voldemort's snake, Nagini, killed Snape on Voldemort's orders. Voldemort thought if he killed Snape, the Elder Wand would be his. But it never was. Draco Malfoy disarmed Dumbledore. Therefore, the wand was his. But Harry Potter overpowered Malfoy making the wand his.