You see the question
As for me, also considering the statement that Eduan has an attack with a cooldown period (from the vigorous debate Yirang and Eduan had, and the lore of Gustang getting a scale an okbi), I predict something along these lines:
>Eduan produce a spear with tiny thunders emitted in many directions,
>He throws the spear far above
>The spear starts to rapidly revolves in all spherical angles, so quick that our 1/24 second perceptive power can't keep up and see a sphere forming
>This sphere is the Shinwonryu, it is composed of light blue thunders, normally not a sphere but we perceive it as so.
>It generates instantaneous thunderbolts in any direction it sees fit to eliminate Eduan's targets.
Of course, imagine the sticking out parts as spear shape, i could not prompt it out from perchance.