Katharterio Salamandra

"Pierce the blue sky, blaze of purgatory."

- Stella chanting before activated Katharterio Salamandra

 (lit. Salamander of Purgatory) is both the Noble Art and Ultimate Technique of Stella Vermillion.

Description
Stella channels flames into Lævateinn causing it to be wrapped in flames, which results in it losing its original form, taking on the shape of a pillar of light expanding upwards for at least hundred meters into the sky. Throughout her battles, Stella has used her Katharterio Salamandra as her main finishing move. It is now powerful enough to leave a huge cut that almost splits a mountain in half.

Weakness
Activating the technique requires some time, making it ineffective during quick exchanges, but she could activate it without the normal charge time albeit not as powerful as shown in the Seven Stars Sword Art Festival Finals in her against Ikki Kurogane. The technique also requires a significant amount of magic.