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[In the Vault]
Arthur's martial collection requirements were somewhat similar to his mana art.
It had to be one, mainly focusing on kicks because of his previous life experiences with Taekwondo.
Second, again Arthur keep in mind the rate of mana absorption since his skill also consumed mana and now also his mana art, which he had obtained just now.
Third, if possible, it would be great if it had a great synergy with stealth and fast paced kicks which greatly blend in with his [Darkness] element.
After a while, Arthur got to a collection that was somewhat good, it was an collection called [Legasus Wings].
It was developed by a hero called Lady Legasus who was named after her great power with the main use of her legs only.
There were two problems with this collection, that led Arthur to discard it.
One, it was highly attributed towards [Light] attribute which was completely opposed to his [Darkness] attribute.