Arthur knew he couldn't win through conventional means — no one understood that better than him. His training had been too short; he was clumsy with a sword, though he could at least defend himself. Facing Ariel, who vastly outclassed him, was a battle he couldn't afford to lose easily.
After thinking hard all week, trying to come up with strategies that might grant him even the slightest window of opportunity, he found himself stuck against an immovable wall. So the plan that came to his mind could either be incredibly stupid or surprisingly clever — some might even call it suicidal and masochistic. But he had found no other way.
That's why he had decided to use the ability:
[Blue Flame][Description: ???]
Of course, he knew nothing about it. The description was sealed. The only thing he knew was that Lilith, along with the other Sins, had shown great interest in it — and that this cursed flame burned both his soul and flesh at the same time.
