However, before terror could even pass through their minds, there came a disbelieving confusion.

Who could have known that Irisviel was hiding in this underground storage?

The protective barrier should have detected any clairvoyance or arriving familiars. However, the enemy skipped any reconnaissance and directly sent the Servant to Irisviel’s safe house with such accuracy; could it be that the enemy had learned of this place a long time ago?

A third shockwave. Before the iron doors were destroyed, the earthen walls around them could no longer take such a powerful impact and collapsed first.

- Fate/Zero: Act 13, Part 4