Location Orochi:Moan – Friday 2 Set Effect  +15% attack
4 Set Effect Grants an additional 8% damage for each orb (spirit fires) you have when damage is dealt.
Suggested Use Any shiki that uses their normal attack as their main damage dealing method.  Also useful in zones that reduce orb cost of skills.
Note  Is useful as a flat damage bonus in lineups that tend to have an excessive amount of extra orbs.  Would pair well with shikigami that primary damage comes from their base attack.  Note: this does work on Ushi no Toki’s doll allowing you to stack this effect on both the DPS and her doll for insane damge amplification