Chinese-server data. English names and effects are provisional; untranslated details remain in Chinese.
Prayer stone
Unity Prayer Stone
团结祷石
PurpleUniversalExtra effect · The slot’s highest Attunement reaches grade B
Source: Random drop
Prayer stone effects
When sailing with 6 or more crewmates, increase all crewmates’ Defense by 8%.
Extra effect
The slot’s highest Attunement reaches grade B
Increase all crewmates’ Defense by 10%.
Acquisition source
Random drop
Recorded source: Random drop.
Source: 遗忘之海 · 祷石记录器 (Chinese)Lore
Item story
The patterns resemble two hands clasped together. Before parting, crewmates each carry a stone. If one is hurt, the others crack, signaling that it is time to help.