Ray of Punishment / Chroma Dust
The attack consists of Mythra slashing into the air before firing off a green projectile. If the special move button is pressed (or just held) before the projectile is fired, it will instead turn into a fan of five smaller projectiles. The initial slash has a fairly large horizontal hitbox that combos into the projectiles, making it a decent out of shield option. However, the projectiles cannot pass through platforms, limiting its use on certain stages. Mythra is able to grab the ledge during the start of the move and after firing the projectiles. When firing Mythra hangs in the air for a bit, leaving her vulnerable from above.
Ray of Punishment is Mythra's Level 1 Special in Xenoblade Chronicles 2, while Chroma Dust is her Level 2 Special in Torna ~ The Golden Country. In the original game, Mythra made less of a leap into the air for both moves, likely due to the ground-based combat of the Xenoblade Chronicles series. Additionally, unlike in Smash, Ray of Punishment's projectile caused an explosion on impact, damaging nearby enemies.