Aesir Heimdall

Opens an energy shield. Blocked melee ATK: Follow-up retaliation. Blocked ranged ATK: Paralysis projectile. Each layer of the shield destroyed removes 15% DMG reduction. When the shield is completely destroyed, the boss will be dazed for a while and take 100% DMG.
[Strategy] Break the defenses using strong attacks such as Battle Storm's Charged ATK, White Comet's Burst ATK, or Scarlet Fusion's Switch ATK.

Charges towards the enemy with a floating shield, dealing DMG and stunning nearby targets.
[Strategy] Tracking is very accurate. Valkyries will need to perform multiple evasions.

After charging, spins rapidly to unleash spike attacks and launch a number of homing projectiles.
[Strategy] Move and evade wisely. Watch out for the projectile attacks.

After charging, swings the massive sword for a large AOE attack. Excess energy will linger for a while in the slash zone and then explode.
[Strategy] Perform 2 consecutive evasions quickly to avoid being caught in the AOE.

Slowly enters Overload when taking hits. Overload will quickly dissipate when the attacks stop. Overload active: Body turns red. Weapon turns into an energy claymore. Gain faster attack speed, empowered attacks, and immunity against Time Fracture.
[Strategy] Keep an eye on the Valkyrie's attack. Avoid stacking massive combo hits to prevent Overload.

Unleashes a devastating barrage, launches homing missiles, and releases slash waves to attack enemies.
[Strategy] Watch out for the bombs, missiles, slash waves, and mighty hews. Perform Ultimate Evasion to avoid the attack AOE.