Chinese-server data. English names and effects are provisional; untranslated details remain in Chinese.
Prayer stone
Whirlpool Prayer Stone
漩涡祷石
BlueUniversalExtra effect · The slot’s highest Attunement reaches grade C
Source: Random drop
Prayer stone effects
When a shipwreck at sea leaves the whole crew critically injured, reduce the memory points deducted by 1.
Extra effect
The slot’s highest Attunement reaches grade C
Reduce the memory points deducted by 2.
Acquisition source
Random drop
Recorded source: Random drop.
Source: 遗忘之海 · 祷石记录器 (Chinese)Lore
Item story
A spiral collapses outward from the stone’s center. Stare for more than three seconds and you may feel as though it is pulling you in.