Treading Through the Mistbound Realm

The arrival of the colossal beings changed everything. No one knew what They were or what They wanted. Some said They might be the last trace of civilization. There are always people destined to become heroes. To save human civilization, they must erase themselves from the world completely. If civilization is dead, will you keep moving forward? (Sci-fi and fantasy. Not hard science fiction, with swords and magic. Human scientific organizations, an academy, time travel, and an ensemble cast.)