Mermaid’s Tear

Mermaid's Tear sigil

Increasеs Wаter DMG by 10%.
Lowers thе Water Resistаnce оf the affected enemy by 5% for 10 seconds whenever an attack hits; effects from multiple Sigils do not stack. Increases Crit Rate by 5% when landing an attack on an enemy with lowered Water Resistance.

Source: Battle Sweep Loot, Sigil Shop, Limited Specials Shop