Albus Dumbledore's possession. When Albus Dumbledore defeated Grindelwald in 1945, mastery of the Elder Wand passed to him. Under his ownership, the wand was largely used for good, unlike many of its former masters.
However, Albus got the Elder Wand by disarming and defeating Grindelwald in their 1945 duel.
Albus Dumbledore achieved ownership of the Elder Wand after the legendary duel with Gellert Grindelwald. Albus possessed the Elder Wand for the next forty years of his life and took it with him to his grave.
According to the legend the ownership of the wand passes on to the person who defeats/ disarms the current owner in a duel. Dumbledore asked Snape to kill him in the astronomy tower when he was surrounded by the death eaters and Draco.
Their complicated ties in Fantastic Beasts
Grindelwald was still determined to enact his vision for the wizarding world. He had also managed to steal the Elder Wand from the wandmaker Gregorovitch – so was now in possession of one of the Deathly Hallows.
Another established rule that Fantastic Beasts 3 retcons is that the killing curse is supposed to be unblockable by any typical protective spell. At the end of Fantastic Beasts 3 though, Grindelwald attempts to use Avada Kedavra on Credence, but Albus and Aberforth Dumbledore successfully block it using golden magic.
He wasn't decisively more powerful than Voldemort. Instead, what makes the focus on Grindelwald so exciting is that he was probably more dangerous than Voldemort -- a notion that has everything to do with his relationship with an unequivocal good guy: Albus Dumbledore.
Voldemort intentionally made six Horcruxes, but when he used Avada Kedavra on Harry, he unintentionally created a seventh Horcrux. Instead of dying, Lily's love for Harry created a counter 'curse' known as Sacrificial Protection and saved Harry.
This nuance was lost on Lord Voldemort, who wrongly assumed Severus Snape held the Elder Wand because he was Dumbledore's killer, when in reality Draco had disarmed Dumbledore before Snape arrived on the scene, making Malfoy the wand's true new owner.
James Potter inherited the Cloak of Invisibility from his father Fleamont Potter. Fleamont was a descendant of Hardwin Potter who married Iolanthe Peverell, the only daughter of one of the descendants of Ignotus Peverell, the original owner of the Cloak of Invisibility.
Known Masters of Death
Albus Dumbledore possessed all three Hallows, but not at the same time. He mastered the Elder Wand, borrowed the Cloak of Invisibility from James Potter before giving it to Harry during his first year at Hogwarts, and found the Resurrection Stone in the Gaunt shack.
Dumbledore and Grindelwald took a blood oath to not fight each other. "Fantastic Beasts: The Crimes of Grindelwald," the second film in the series, reveals that as teenagers Dumbledore and Grindelwald undertook a blood pact that wouldn't allow them to move against each other.
“Dumbledore didn't want to lose his wand at that point and Draco disarmed him. So that meant that the wand gave Draco its allegiance, even though Draco never knew it, even though Draco never touched it. “From that moment on, that wand gave its allegiance to Draco, and it wouldn't work as well for anyone but Draco.”
Seeing as Credence was Aberforth's son, the pact broke when the Dumbledores' blasts connected with Grindelwald's blast. As Albus would rationalize later with Newt, his spell was meant to protect, and it canceled out Grindelwald's, which was meant to kill a Dumbledore.
So, Voldemort had to kill Snape for the wand's allegiance to switch. Voldemort knew he couldn't cast Avada Kedavra with the Elder Wand to kill its master, so he ordered Nagini to be the one who killed Snape. In reality, the Elder Wand belonged to Draco, as he was the one to disarm Dumbledore in the Astronomy Tower.
Quirrell didn't use the Killing Curse on Harry, because Voldemort said “use the boy” to get the Sorcerer's stone from the Mirror of Erised.
Draco Malfoy's mother Narcissa was cold, cunning and devoted to the Dark Lord. But she was also a mother, which meant she was willing to risk everything to make sure her son was safe. When Harry survived Voldemort's Killing Curse for the second time, Narcissa pretended he was dead so she could get to Draco.
Though Harry encountered many opportunities that deemed Avada Kedavra necessary, it remains as one of the Unforgivable Curses Harry Potter never cast. For one, he viewed the spell as an immoral practice commonly used by users of the Dark Arts.
The most likely reason why Lord Voldemort's nose disappeared and he devolved into such an evil-looking creature is that as he dabbled deeper into the Dark Arts, his appearance gradually became as distorted as what remained of his twisted soul.
The only one Grindelwald did seem to have genuine fear of appears to be Albus Dumbledore, as he quickly fled the scene after Ariana was killed trying to intervene in a duel he started, and later in life when he refrained from attacking England despite his possession of the Elder Wand out of fear of his former friend.
Grindelwald. Grindelwald is renowned on the same level as Dumbledore and Voldemort. And while Snape is powerful, he is nowhere close to Grindelwald. At their peak, Grindelwald stomps hard.
Dumbledore may have been a legendary wizard, but he can't be compared to, well, Merlin, a wizard so legendary even Muggles know of his exploits. Merlin was the world's most famous wizard, and, arguably, the world's most powerful.