Weapon Name: Double Medeium Sword.
Weapon Type: Over Soul Sword.
Weapon Affinity: Does not have any elements.
Weapon Sealed Description: I do not know if it's a sealed version , but the first medeium for the oversoul of the double medeium is The sword of light , this is the first version , but when oversoul is used on the sword as it's medeium and then the antiquity is used for the double medeium a very large sword with a red armour gaurd is formed.
Weapon Spirit: Amedamaru is the ghost used for the oversoul , he is yoh's guardien ghost.
Weapon Background: An antiquity , a red sort of dagger that is blunt was given to yoh before he and his friends experienced the past of hao , after yoh and the gang had emerged from a tunnel , they were under attack by hao , the gang's furyoku had increased by a large amount and they felt so powerful , but amedamaru was feeling very strange , he had so much power now , so yoh thought aswel and came up with an idea , he preformed oversoul with amedamaru and then used the antiquity as the second medeium and so the double medeium is formed.