Mana Burst (Flame) (魔力放出(炎), Maryoku Hōshutsu (Honō)?) is a version of Mana Burst that infuses weapons with Magical Energy that imparts a flame effect.[1]
In Karna's case, blazing flames become magical energy to dwell in the weapon used. This Skill is usually active and all the weapons that Karna grasps receive this effect.[1]
A Skill that came attached to his Noble Phantasm Agni Gandiva that he received from the God of Flames AgniWP. Jet-like burst of mana is released, not from his body, but as propulsion for his arrows, allowing them to pierce Arjuna's enemies faster than a rifle.[2]
A Skill that came from the anecdote where she fell asleep, surrounded by a ring of flames in a fire-packed pavilion. As her passion gets deeper, the flame becomes stronger, burning on the basis of her magical energy.[3]