How did Voldemort not recognize Kreacher?

Though Voldemort left Kreacher to die in the Horcrux Cave, he did not seem suspicious when Kreacher later helped him through Bellatrix and Narcissa. It is possible that he did not realise that Kreacher was the same elf, as Voldemort did underestimate the species.

Why did Voldemort take Kreacher to the cave?

The first incursion upon the cave was by Regulus Black and Kreacher after Voldemort asked Regulus Black for a house elf. Regulus worked out that Voldemort had made Horcruxes and asked Kreacher to take him back. Regulus got the locket, which was later stolen from the Black family home.

How did kreacher survive the cave?

In order to test his carefully constructed defences, Voldemort used Kreacher’s blood to open the cave and made Kreacher drink the potion from the basin on the island. House-elf magic was something Lord Voldemort considered far below his notice; therefore, he had not anticipated Kreacher surviving.

Why could Voldemort not get another Horcrux?

Voldemort could not get another Horcrux because he did not know he had seven in the first place. When he tried to kill Harry, the spell rebounded and killed him instead. His soul became disembodied and jumped into the closest living thing in the room, Harry.

What did Voldemort find when he searched for the founders?

When Voldemort searched for items from the Hogwarts founders, two appeared at once – Helga Hufflepuff’s cup and Salazar Slytherin’s locket.

What would have happened if Harry had fought Voldemort?

All it would’ve taken were a simple few steps to Harry’s body and Voldemort would have won. It was through Snape’s memories that Harry found out he was supposed to offer himself up to be killed by Voldemort. And accessing his memories was only possible because Voldemort had left Snape to die slowly.

Could Voldemort have killed Harry Potter without the Elder Wand?

Sure, Voldemort did use the Cruciatus Curse on Harry — the Elder Wand protected him then — but if Voldemort had simply checked up on Harry’s condition personally, he could have easily had someone else kill him. All it would’ve taken were a simple few steps to Harry’s body and Voldemort would have won.