After obtaining his Restrain rune, Arthur took out the other two artifacts that he obtained from the dragon. One of them was one he couldn't learn yet, called Replicate, and would allow him to make a copy of himself that had no physical body but looked otherwise the same.
Sadly, he couldn't learn that rune yet. At least, he managed to glean off the information of the hand mirror in his hand. His ability seemed to improve but there were other runes that he can't learn yet, like the flight rune that the runic jet used. There were also the many runes his fortress had.
These runes were in their epitome state, unlike the Restrain rune that was of a lower level that Arthur can learn. The last one, luckily, was something that Arthur could handle.
[Etherealized-Attack: Create an ethereal version of the weapon to increase your attack's strength.]