が、聖杯はその不可能を可能にした。
But, the Holy Grail did that impossibility render as possible.
本来人間の手におえぬ英霊をまるごと召喚し、あまつさえマスターに仕える使い魔に固定した。
Summoning whole Heroic Spirits originally beyond the control of man, and thereon affixing them as Familiars in the service of Masters.
そのデタラメさは、まさに聖杯が万能である事の証でもある。
Such nonsense was verily the proof that the Holy Grail was omnipotent (万能, bannou, "of ten thousand potencies").
そうして年代を問わず、近くは百年前、遠くは神代の頃から英霊は召喚された。
And irrelevant of era — from as near (近く, chikaku) as a hundred years prior (百年前, hyakunen-mae); or as far as the vicinity of the Age of Divinities (神代の頃, jindai no koro) — Heroic Spirits have been summoned forth.
七人の英霊はそれぞれ七人のマスターに従い、おのがマスターを守護し、敵であるマスターを駆逐 する。
Seven Heroic Spirits serve seven masters — protecting their own Master, and expelling those Masters that are their enemies.
……あらゆる年代、あらゆる国の英雄が現代に蘇り、覇を競い合う殺し合い。
... Heroic Spirits of every era; every nation do in modernity revive, to vie for supremacy in a deathmatch.
それが、この儀式が聖杯戦争と呼ばれる由縁だろう。
Such would be the reason that this ritual is called as the War for the Holy Grail, perhaps
.