In the time between the Harvest Moon and the War Moon, Lu Cang did quite a bit of research on Death Spells.
Every Death Spell requires a soul to be cast.
But the soul requirements vary.
The requirement for Death Substitute is to consume a soul with Spirituality equal to or greater than one's own.
The requirement for Spirit Burst is to consume any soul, but its power varies based on the soul's strength.
The requirement for Soul Wound Curse and Evil Binding Curse is a soul of Low Spirituality.
'I'm not sure what exactly qualifies as "Low Spirituality"... I just know that of all the Demon Souls I currently possess, almost all of them are of "Small Spirituality" if they don't trigger Noble Soul.'
'Oh well. For me, all these casting conditions just mean I can use any soul anyway.'
In the process of contemplating the Root Source, he managed to create a Death Spell of his own.
「Corpse Bone Ice Storage (Tier One Death Spell) (Level 201)」
