Royal Demon Blood

The Blood from Royal Demons is responsible for creating people with special abilities

Temporary

This will give them powers for as long as they have the Blood in their system

Permanent

If they are Human and given the Blood before they are 6 months old then they will have them for the rest of their life
Also, something that's also pretty neat is that when they drink Royal Demon Blood their powers grow much stronger [The More they drink The Stronger they will be] {Their strength will return to normal after being off of it for a awhile tho}