Morphable Echo - Law of Harmony

Open to obtain a random Echo of the following Sonata Effect: Law of Harmony

3pcs Set: Casting Echo Skill grants 30% Heavy Attack DMG Bonus to the caster for 4s. Additionally, all Resonators in the team gain 4% Echo Skill DMG Bonus for 30s, stacking up to 4 times. Echoes of the same name can only trigger this effect once. The record of Echo triggering this effect is cleared along with this effect. At 4 stacks, casting Echo Skill again resets the duration of this effect.