Brass wing. When The Valkyrie of Brass have hit points above 100, its can fly with equal to its move speed.
Legendary Resistance (1/Day). If the Valkyrie fails a saving throw, it can choose to succeed instead.
Life link. The Valkyrie of Brass will not die even hit points reach 0, unless other two Valkyrie hit points reach 0. If not The Valkyrie of Brass gain 5 hit points every turn until its reach 25 hit points.
Brass citadel. Each creature within 600 ft. who try to attack or cast spell at The Valkyrie of Brass even an area of effect spell still count as one, must make a wisdom saving throw with DC20 or else take 10 psychic damage and cannot take action this turn.
Multiattack. The Valkyrie of Iron makes three talon attacks.
Talon. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 15 (4d4 + 5) slashing damage.
Unify attack. When used other two Valkyries must use its reaction to move up to its speed or else attack automatically fail, with this attack target with below 10 hit points instantaneous dies by ripping into pieces.
Ripple melody. The Valkyrie of Brass sing world ending song, as long as this song still singing all of Valkyries make attack with advantage and deal additional 20 (4d4+10) necrotic damage. The Valkyrie of Brass cannot singing while perform any action or take 20 damage.
Tear of goddess. When other creature within 60 ft. other than the Valkyrie of Brass take damage, its can sue reaction to heal that damage back by halve round down.