MANA
Mana is the natural energy found in every living thing every living thing has mana but not all can control them, it js mainly welded by sorcerer or mages but it doesn't stop someone from learning it for daily use if they are talented
WILL
This is the cumulation if a warriors strength and experiences unlike mana which is guaranteed in every human the ability known as "will" is latent until forced out through great suffering or great achievements
Demons Magic
Unlike the remaining races demons can use both mana and wills simultaneously though it could be learnt by the other races it comes more naturally for demons
#demon curses#
When a demon dies they can curse whoever slayed them inbuding their slayers soul with a special curse and is unique to each demon
Note: sigils can stack
#Demon sigils#
They can be altered if you have the ability to manipulate both mana and your will you could easily alter it but it can't be removed