English | Japanese
"Drill! Gáe Dearg! Gáe Buidhe!”
Gáe Buidhe: Yellow Rose of Mortality (必滅の黄薔薇, Hitsumetsu no Kibara?, 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. It is a dangerous spear, but only its owner, Diarmuid, can stand up to the tip of Gáe Buidhe and stay uninjured while stepping into it.
The effect cannot be normally 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. It is just a spear if used in a short-term decisive battle, but thinking based on the assumption that one can fight the same opponent several times over a long period of time, it can be something like a really effective body blow that slowly yet surely works. If the target is not a Servant, it can be expected that the affected wound is fatal as one will bleed to death over time. Like Gáe Dearg, although it is lacking in flashiness, it is a really useful Noble Phantasm that is very user-friendly.
- ↑ 1.0 1.1 1.2 1.3 1.4
 Fate/Zero material - Servant Status: Lancer, p.016-017
- ↑ 2.0 2.1 2.2
 Fate/Zero - Volume 4: Gáe Buidhe: Yellow Rose of Mortality
 Fate/Zero material - Weapons: Gae Dearg Gae Buidhe, p.122-123
- ↑ Fate/Grand Order Material Book II