Kōrinotsurugi no geijutsu

It is a lost magic type ability. The attack sends dragon slayer magic threw the user and he can emit it from one certain object. Similar to holder magic in a way.

Definition
For users with dragon slayer magic, it absorbs the energy and amplifies it with a Lacrema of the same magic type. There are seven diffrence stances that have been learnt for this magic.

Aisudansu
This stance protects its user by forming a pair of wings on the user, that allow to defend himself against attacks, or to fly(similar to the wing of Exceed).