Flourish of Steel
連閃 [rensen] or 'companion flash' in Japanese.
Airborne Brigade

Lightning IV (SR summon)
Type: Legend, Element: -, Growth: Normal, Cost: 54
Brave: 2,962 (lv1), ? (lv240), 16,176 (lv270), 17,649 (lv300), 19,123 (lv330), 20,597 (lv360), 22,070 (lv390), 23,544 (lv420), 25,018 (lv450), 26,492 (lv480)
Ability: Flourish of Steel
Obtain: Shattered World ally level-up reward
Category: Ability