B1:

Increases Elemental Mastery by 80.

B2:

When nearby party members trigger Lunar Reactions, if the equipping character is on the field, gain the Gleaming Moon: Intent effect for 4s: Increases CRIT Rate by 15%/30% when the party's Moonsign is Nascent Gleam/Ascendant Gleam. All party members' Lunar Reaction DMG is increased by 10% for each different Gleaming Moon effect that party members have. Effects from Gleaming Moon cannot stack.