И этот клинок стал охраной для Святых гор до того денька,

And this sword was the protection of the mountains for the Saints until the day until there is someone who will find "a path between the ages", the coffin Svyatogora sword and released a powerful defender who can banish all evil with Russia.
Или
And this sword was the protection of the mountains for the Saints until the day until there is someone,who would find "a path between the ages" coffin Svyatogora sword released mighty defender,who will be able to banish all evil with Russia.