Harry Potter 7 - Ending Questions (*SPOILERS*)?

You forgot that Albus Dumbledore is a powerful wizard so that's why he defeated Gridewald!!!No you don't have to kill someone to take his wand and you would have known that if you have read the book more carefully. Malfoy is the owner of the wand because when Snape killed Dumbledore with Avanda Kedavra, the killing curse it was as Malfoy had done it cause Snape promised to help Malfoy kill Dumbledore when Narkisa persuade him to it at the beginning of the book 6. So when harry took Malfoy's wand it was as he was taking the elder wand , I think. The elder wand may be a powerful wand but it is still a wand.