Board Thread:General Discussion/@comment-26830922-20150905023430

According to Yhwach, after he lost the war 1000 years ago the Quincy secretly formed the "Shadow Territory" in the Seireitei as it was the least guarded area of the Soul Society at the time. This suggests that the huge Sekiseki walls surrounding Seireitei were built in response to the war. However, as we saw when Zangetsu used the Quincy shadow technique in Ichigo' s battle with Kenpachi it does not last permanently (likely due to consuming too much of the surrounding reishi). However the Sekiseki walls also created a spiritual barrier above and below seireitei. With this enclosed set of space and unlimited reishi from the whole of Soul Society, the Quincy were able to make this new dimension permanent. Consequently, the Gotei 13's absolutist measure for protecting the seireitei resulted in its downfall. However, this also begs the question that if the walls surrounding the Seireitei were destroyed than the Shadow Territory would have dissipated (if Yhwach had not already integrated it into the Royal Realm). What do you think? 