Originally Posted by
Kozh
Did Ultima even used for calamity? I don't think so. Considering the WoL regale her with their story, might be that she thought not sealing Ultima will affect the timeline. Either that or simply because ultima threatens the Source, and She can't have that can she, since the final fight against meteion hasn't happened yet.
And the prevented calamity you mentioned, the First? She definitely knew how crucial it is in order for us to defeat emet and elidibus there and for the time travel technology. So of course she's going to prevent it. But the other seven calamites? rip to those shards.