User blog comment:B214/Question and Answers/@comment-95.234.163.134-20131213181733/@comment-16281343-20131214015700

1. Xenovia gave Kiba the "blessing" or right to wield Durandal temporarily.

2. The preparations are for Ise to be able to use Ascalon which is a holy sword and a dragon-slayer which contradicts Ise's nature which is a devil with a dragon-type Sacred Gear.

3. If he can use Ascalon's dragon-slaying ability, I don't see why he can't use its holy power as well.