This spell temporarily gives a mundane weapon magical properties, allowing it to harm beings such as mazoku or deflect minor spells. When it is cast, the target weapon's blade or tip is enveloped in a faint crimson glow. The caster does not need to concentrate to maintain the spell, and the enchantment does not end when the weapon leaves the caster's hands, so a sorcerer can use Astral Vine to boost the offensive capability of the entire party. In the 15th novel it was shown that the spell is even capable of enchanting part of the ground below the caster's feet, causing offensive earth spells, otherwise unable to harm mazoku, to become usable against them if their effects are drawn from the target area.