B1:

Increases Elemental Mastery by 80.

B2:

The equipping character's Bloom, Hyperbloom, and Burgeon reaction DMG are increased by 40%, and their Lunar-Bloom reaction DMG is increased by 10%. Additionally, after the equipping character triggers Bloom, Hyperbloom, Lunar-Bloom, or Burgeon, they will gain another 25% bonus to the effects mentioned prior. Each stack of this lasts 10s. Max 4 stacks simultaneously. This effect can only be triggered once per second. The character who equips this can still trigger its effects when not on the field.