Prospector's Drill (4★)

When the wielder is healed or heals others, they will gain a Unity's Symbol that lasts 30s, up to a maximum of 3 Symbols. When using their Elemental Skill or Burst, all Symbols will be consumed and the Struggle effect will be granted for 10s. For each Symbol consumed, gain 3% ATK and 7% All Elemental DMG Bonus. The Struggle effect can be triggered once every 15s, and Symbols can be gained even when the character is not on the field.