SPOILER discussion below this line....

YOU HAVE BEEN WARNED!
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So suddenly we have a new voice in our head who is trying to summon us to where he is....

All of this for the single goal of changing the future where our actions caused a Calamity because we follow our current path.

So many people are being removed so the future can change to prevent the original future from happening but what action did the WoL and Scion's influence cause that created this Calamity?

So what do you think happened that caused a Calamity in the original timeline where the WoL and Scions played their roles normally (where the voice never interfered nor had any influence on events) and who is the Voice trying to prevent this Calamity by change the present/past by removing the Scions from influencing WoL?