Chinese-server data. English names and effects are provisional; untranslated details remain in Chinese.
Prayer stone
Cloud and Mist Prayer Stone
云雾祷石
BlueUniversalExtra effect · The slot’s highest Attunement reaches grade C
Source: Random drop
Prayer stone effects
During cloudy weather, increase allied units’ critical damage by 20%.
Extra effect
The slot’s highest Attunement reaches grade C
Increase critical damage by another 10%.
Acquisition source
Random drop
Recorded source: Random drop.
Source: 遗忘之海 · 祷石记录器 (Chinese)Lore
Item story
Layer upon layer of mist—or perhaps uncatchable clouds—coils within. The stone feels cool to the touch.