|Title:||Yellow Rose of Mortality|
|Transliteration:||Hitsumetsu no Kibara|
|Maximum number of targets:||1 person|
Gae Buidhe: Yellow Rose of Mortality (必滅の黄薔薇, also translated as The Golden Rose of Mortality?) is a cursed spear 1.4 meters long that inflicts wounds that cannot be healed naturally or with magecraft. It was a gift given to Diarmuid Ua Duibhne by Manannán mac Lir, the king of fairies, and he normally keeps it wrapped in a talisman cloth to seal its abilities and keep it from revealing his identity.
Unlike most other Noble Phantasms, the abilities of the spear are passive in nature. It does not require its name to be called upon in order to be utilized, allowing it to instantly actualize its curse of mortality upon striking the enemy. The spear lowers the opponent's maximum health limit, thus limiting healing and regeneration abilities to the point where the opponent received the injury. When Saber receives a light wound on her left arm that severs her tendons, Irisviel is unable to heal it with magecraft due to her being considered in a state of full health. The effect cannot be dispelled, and canceling the curse requires the destruction of the spear or the death of its owner. While Saber's wound is shallow, it seals off her ability to use Excalibur properly until Lancer forcefully destroys the lance on his own. The enormous curse contained within gushes out in a whirlwind, scattering into nothingness and allowing Saber to return to full health instantly.