The user of this power possesses and is able to use strong demonic power. This ability not only grants the user great strength, abilities, and control over numerous variations of demonic energies, but also allows them to overpower weaker demons as well as rival that of powerful demonic entities.
Samael (Darksiders) is a powerful Demon Lord who is said to posses power great enough to rival that of the Dark Prince, Lucifer.
Being the eldest son of Sparda, Vergil (Devil May Cry series) posses demonic powers that make him more than match for any lower demon, and allow him to match and even surpass Dante in battle.
Although he is a half demon, Inuyasha (InuYasha) inherits incredible demonic powers from his father, the Inu no Taishō. Because of this, he has been able to take on and defeat powerful demons such as Ryūkotsusei and master powerful attacks such as Wind Scar, Backlash Wave, and the Meidō Zangetsuha.
Unlike his half-brother, Inuyasha, who was born a half demon, Sesshōmaru (InuYasha) is the first son to the Inu no Taishō and to another female dog-demon, making him a full demon. As such, his demonic powers are superior to that of his brother's and is able overpower any demon he fights.
The demon, Inferno (Soul series) is the will of the demonic sword, Soul Edge. As the driving force behind Soul Edge and Nightmare, it can gain power from the souls of its slain enemies, and corrupt the mind and body of it's host.
Kazuya Mishima (Tekken series) possseses the Devil Gene , a supernatural genetic abnormality found in the Mishima bloodline. With its power, Kazuya is able to access his Devil form, increasing his strength, obtain flight, project powerful lasers, and mix his Mishima Style Fighting Karate with his supernatural powers.
As a descendant of the Mazoku warrior, Raizen, Yusuke (Yu Yu Hakusho) possesses demonic strength and power that surpasses even that of Sensui's S-class Sacred Energy, which is said to be the echelon of power.