Chinese-server data. English names and effects are provisional; untranslated details remain in Chinese.
Prayer stone
Siege Prayer Stone
攻城祷石
PurpleUniversalExtra effect · The slot’s highest Attunement reaches grade B
Source: Random drop
Prayer stone effects
When a friendly unit attacks a shielded enemy, increase damage dealt by 20%.
Extra effect
The slot’s highest Attunement reaches grade B
Increase damage dealt 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
The crack inside this stone grows a little wider each day. Legend says that when it crosses the entire stone, armor struck by it will shatter like rotten wood.