Hellblaze

is a demonic enchantment possessed by the Dragon's Sin of Wrath, Meliodas; and the Great Holy Knight, Hendricksen.

Description
Hellblaze is dark and mysterious power connected to the demon clan. The enchantment allows the user to generate and control black flames that cannot be extinguished. In addition to its immensely devastating power, the flames also nullify the regenerative abilities of an immortal. In battle, Hellblaze can be imbued upon weapons to drastically increase their destructive potential or hurled as fireballs at an opponent.

Techniques

 * Hendricksen projects them as fire blasts towards enemies through his shortsword capable of burning the entire area into the ground.
 * A powerful technique that required Meliodas to heighten his full power and senses to the utmost limit and fired in a large stream of black flames in order to make a one decisive attack.

Trivia

 * The only known person who was able to put out the flame was Merlin.