Katharterio Salamandra

"Pierce the blue sky, blaze of purgatory."

- Stella chanting before activated Katharterio Salamandra

 is the Strongest Noble Art among the arsenal of Stella Vermillion.

Description
Katharterio Salamandra is the ultimate technique of Stella, where she channels flames into Lævateinn causing it to be wrapped in flames, which results in it turning into a pillar of light and heat that extends at least one hundred meters into the skies losing its original physical form. Throughout several fights against powerful enemies, Stella has relied on her Katharterio Salamandra as a finishing move at living flesh and bone can't survive it, however, it isn't unbeatable as it lost to Ouma Kurogane's Kusanagi.

Though after Stella realized her true power, she used Katharterio Salamandra to break through even Charlotte's Senben Junka albeit it was held back for a moment, as well as overpower Kusanagi. This noble art has grown powerful enough to split 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.

Trivia

 * Katharterio Salamandra (καθαρτήριο σαλαμάνδρα) means "Salamander of Purgatory" in Greek.