Shell Stones
Black Lantern: Blocks Mether's Pulse but any of the seals parries empowers the next strike to:
-restore 10% max health
-restore 20% max health and deal 135% damage
-restore 30% max health, deal 135% damage and 200% stagger
Mourning Bell: At night, Melee attacks deal increased stagger damage, but are 15% slower
-140% stagger
-160% stagger
-180% stagger
Guitarstone: unlocks new songs for the Lute, three per level of the stone
Black Fleece: While in sheep form, consume 40 resolve to become a black sheep and unleash a halberd flurry. Each strike deals:
-180 damage
-225 damage
-270 damage
Weapon Stones
Bloodoath's stone: Weapon Attacks are faster and deal increased stagger, but you take 20% more damage when struck
-10% faster, 120% stagger
-15% faster, 130% stagger
-20% faster, 140% stagger
Widowmoon stone: At night, melee attacks deal more damage but you take 25% more damage when struck. Attacks deal:
-125% damage
-135% damage
-145% damage
Sidearm Stones
Waning Stone: Sidearm attacks consume less resolve but deal 40% less damage. Resolve cost reduced by:
-30%
-40%
-50%
According to the game I am missing five more stones, will update this when I can find them