lance1397
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I think only a white core would be able to kill another that quickly. Anyone below that even in a large group would probably need a lot of time to get past their top of the line items or mage towers. It's also possible that Mogar protects them since it forces them to watch.
I think it was there before, during that vacation time.
So you can get tribulations even after white core? I guese that explains Faluel's story of Guardians dying. Failing a tribulation could be one way.