World background: "Ember Earth" - the broken world after the Final Flame. The surface is a wasteland ravaged by deadly radiation, mutated monsters, and energy storms. The survivors huddled in the "Purge Dome" city ruled by the "Radiant Temple", or struggled among the wasteland tribes. The temple monopolizes purification technology, knowledge, and force, and promotes the extreme doctrine of "removing pollution and returning to purity." But deep in the wasteland, the old rulers (the ancient gods who defeated the ancient gods) who caused the "Final Flame" are sleeping/sealed and their families. What's even weirder is that the relics of the old war are mixed with highly developed "psychic technology" creations (cyber elements).
Strength system:
Temple system: Faith-driven "purifying spiritual energy" (light and heat, order, decomposition of pollution), but the higher levels may have been distorted.
Wasteland mutation: Physical strengthening, elemental manipulation (radiated fire, acid, etc.), Mental induction (low-end psychic powers).
Forbidden knowledge: "Secrets of the Void", "Refining of Flesh" and "Spiritual Pollution" related to the old rulers (the protagonist's main route). The effect is powerful and strange, at the cost of SAN value (sanity value) and body dissimilation (long tentacles, extra eyes, etc.).
Psionic technology: Weapons, vehicles, and AI of lost civilizations require specific blood or knowledge to drive them.
