Esfandiyār

The ability to essentially function without a Master, even after a Holy Grail War has ended... somewhat. Due to certain circumstances that occurred during his manifestation as a Servant, this skill has essentially been rendered null.

A skill which negates any magecraft of insufficient power, no matter how how high level it is. As Archer is a holy warrior of Zoroaster, it should come with little surprise that he is virtually untouchable by modern magi.

A skill which demonstrates the user's unshakeable will. Combining the effects of Bravery and Calm and Collected, it manifests in Archer as the ability to withstand mental deterioration over long periods of time. This stems from the episode in which Esfandiyār was falsely imprisoned by his own father for treason. Despite being bound in chains for years on end, he remained loyal to his country after learning of his brother's heroic sacrifice in his place.

A skill denoting experience with killing wild animals and beasts, granting increased combat prowess when facing enemies of this type. Archer is no stranger to slaying a variety of beasts, having done so four times over during his siege of the Dež-e Rūyīn. These included a pair of monstrous wolves, two fearsome lions, a poison-breathing dragon, and a fully grown Simurgh and its children.

A boon granted to Archer by the prophet Zoroaster, decreeing that the one to kill him will be despised by the heavens itself. The curse is a constantly active skill which activates upon Archer's death, in which case his killer will slowly have their vitality or magical energy stolen from them in the days after. The skill will only activate if the death was caused by another person, meaning that it will not work in cases such as self-inflicted suicide or environmental deaths.