User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-77.255.37.50-20150521143441/@comment-16281343-20150521144528

It doesn't absorb ability. Only the holy aura.

After gaining that ability, Kiba remarked that this may help him in his use of Gram. (Holy-Demonic Swords holy aura is too little to bottle Gram's curse but with the new ability, that problem may be solved.)