Chinese-server data. English names and effects are provisional; untranslated details remain in Chinese.
Prayer stone
Mana Prayer Stone
法力祷石
PurpleIntelligenceExtra effect · Intelligence Attunement reaches grade B
Source: Random drop
Prayer stone effects
For each damage-over-time stack applied by Intelligence crewmates on an enemy unit, increase the additional action damage it takes by 1%.
Extra effect
Intelligence Attunement reaches grade B
Each damage-over-time stack increases additional action damage taken by another 0.5%.
Acquisition source
Random drop
Recorded source: Random drop.
Source: 遗忘之海 · 祷石记录器 (Chinese)Lore
Item story
A blue pattern at the stone’s heart flickers like a bottle. Some say chanting with it beneath the tongue can awaken the most primordial wisdom.