Sacrificed to Summon a Shattered God

In a world overrun by demons, humanity is forced to survive in walled cities under the personal protection of their gods. When Derzina's city comes under attack, her goddess rushes to defend it only to be slain. Deprived of their guardian, the people of the city concoct a ritual to return her to them. However, the ritual requires a vessel to be offered to the goddess. Derzina, a lowly initiate, is chosen as the sacrifice for her goddess' resurrection.