Chinese-server data. English names and effects are provisional; untranslated details remain in Chinese.
Prayer stone
Throwing Knife Prayer Stone
飞刀祷石
PurpleAgilityExtra effect · Agility Attunement reaches grade B
Source: Random drop
Prayer stone effects
After an Agility crewmate attacks with a signature skill, reduce the main target’s critical resistance by 3 levels for 2 turns.
Extra effect
Agility Attunement reaches grade B
Reduce the main target’s critical resistance by 1 additional level.
Acquisition source
Random drop
Recorded source: Random drop.
Source: 遗忘之海 · 祷石记录器 (Chinese)Lore
Item story
A blade-shaped crack near the top is almost split open. Sailors skilled in ambush coat their blades with chips from the stone, letting throwing knives pierce a sail in silence.