a comparatively less potent effect. In Philosopher's Stone, Harry had to try out many wands before he found one that "chose him." Wands with cores from the same source give strange effects (Priori Incantatem) when forced to fight each other, as is the case with Harry and Voldemort's wands. In Goblet of Fire, it is revealed each of their wands contains a tail feather from Fawkes, the phoenix belonging to Dumbledore. After Priori Incantatem, the wands get to know the opposites' master, as explained in Deathly Hallows. While, according to Ollivander, any object can channel magic if the wizard is strong enough, wands are the most commonly used because of their efficiency (due to the owner's bond with the wand itself). This can explain how some wizards are able to use spells without wands (for example, retrieving an item with Accio''). Furthermore, wands are able to be won from a witch or wizard and can therefore change their allegiance. This is the case when Harry takes Draco's wand at Malfoy Manor, and consequently the wand's allegiance swaps to Harry, as explained by Ollivander; and, by extension, so does the allegiance of the Elder Wand, which itself has changed hands many times. References Fictional elements introduced in 1997 Objects Fictional garments Harry Potter Harry Potter lists