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 any regenerative abilities including that of an immortal. In battle Hellblaze can be imbued upon weapons to drastically increase their destructive potential, hurled as fireballs at an opponent or used in hand-to-hand combat.
- Kami Chigiri「神千斬り Kami Chigiri; literally meaning "Divine Slayer"」: A powerful attack that requires Meliodas to heighten his power and senses to the utmost limit. Black flames engulf his sword as he leaps into the air. He then performs a powerful slash that hurls the flames in a single, ruinous attack.
- Hellblaze Wave「
波状の獄炎Hajō no Gokuen (Herubureizu Wēbu))」: Hendrickson points his sword towards the opponent and engulfs them in a wild, black inferno.
- The only known person who was able to put out the flame was Merlin.