User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-77.255.37.50-20150521143441/@comment-208.169.90.206-20150524191548

Kiba has the ability to make any Demonic, Holy, or Holy-Demonic Sword he wishes (he just needs to practice to get a specific power to work an example would be his Dragon slayer) so he doesn't need to absorb the powers of Excalibur he could just make a sword with its abilities, of course it wouldn't be of the same caliber though.