======Thestral Tail Hair======
=====Object Information=====
  * **Type:** [[Wand Core]], [[Magical Ingredient]]
  * **Owners:** The single known strand used as a [[wand core]] has been possessed by all masters of the [[Elder Wand]], including (but not limited to) [[Antioch Peverell]], [[Gregorovitch]], [[Gellert Grindelwald]], [[Albus Dumbledore]], [[Draco Malfoy]], and [[Harry Potter]].
  * **Maker:** Sourced from a [[Thestral]].
=====Description and Appearance=====
Thestral tail hair is a magical substance taken from the long, black tail of a [[Thestral]]. As these creatures are skeletal, winged horses with a reptilian cast to their heads, their hair is presumed to be coarse and black.
It is an exceptionally rare and powerful substance, most notably used as the core of the [[Elder Wand]]. While individual hairs can be obtained, they are not typically treated as singular magical objects but rather as a potent ingredient for use in powerful magic, particularly [[wandlore]].
=====Magical Properties and Usage=====
Thestral tail hair is an immensely powerful, yet notoriously difficult, substance to use in [[wandlore]]. [[Albus Dumbledore]] described it as a "**potent and tricky substance that can be mastered only by a [[wizard]] who can accept [[death]]**." This property directly mirrors the nature of [[Thestral]]s themselves, which can only be seen by those who have witnessed and processed the concept of death.
The primary and only known use of a Thestral tail hair is as the core of the [[Elder Wand]], one of the three [[Deathly Hallows]]. Its inclusion in this legendary wand is what grants the wand a significant portion of its formidable power and its unique, conquest-based allegiance. A [[wand]] with a Thestral tail hair core would likely be temperamental and drawn to powerful magic, possibly with a proclivity for the [[Dark Arts]], though its ultimate allegiance lies with a master who understands mortality rather than one who fears it.
It is considered an unstable and dangerous core for the average wandmaker to handle and is not one of the three "Supreme Cores" used by [[Garrick Ollivander]]. (Pottermore)
=====History=====
The history of Thestral tail hair as a [[wand core]] is synonymous with the history of the [[Elder Wand]]. According to legend, the wand was crafted by [[Antioch Peverell]], the eldest of the three [[Peverell brothers]], who chose this core for its raw power. For centuries, the nature of the [[Elder Wand]]'s core remained a secret, known only to a select few, such as [[Albus Dumbledore]], who conducted extensive research on the wand after defeating [[Gellert Grindelwald]].
The secret was finally revealed to [[Harry Potter]] by the spirit of [[Albus Dumbledore]] in the ethereal version of [[King's Cross]] station following Harry's encounter with [[Lord Voldemort]] in the [[Forbidden Forest]]. This revelation was key to understanding why the wand's allegiance was so difficult to win and hold.
=====Role in the Story=====
Thestral tail hair serves a critical symbolic and narrative function in //Harry Potter and the Deathly Hallows//. Its existence provides a logical and thematic explanation for the unparalleled power of the [[Elder Wand]].
More importantly, it reinforces the series' central theme regarding the acceptance of mortality. The fact that the most powerful wand ever created can only be mastered by someone who accepts [[death]]—not by fearing, defying, or seeking to conquer it—is the ultimate lesson that [[Harry Potter]] learns. This concept stands in stark contrast to [[Lord Voldemort]]'s philosophy of avoiding death at all costs. The reveal of the core solidifies Harry's status as the true "Master of Death" and, consequently, the true master of the [[Elder Wand]].
=====Behind the Scenes=====
  * On the Pottermore (now Wizarding World) website, it is confirmed that Thestral tail hair is a substance that no wandmaker other than the creator of the [[Elder Wand]] is known to have used. [[Garrick Ollivander]] certainly did not use it, stating that it makes for a "tricky wand in every sense of the word." (Pottermore)