Black Leg Style/Ifrit Jambe

Ifrit Jambe is a a stronger variant of Diable Jambe developed by Sanji during the raid on Onigashima. After Sanji equipped the Raid Suit created by Germa technology, he soon found himself turning into a Modified Human similar to his siblings. After coming to terms with and accepting his modifications, Sanji realized he can combine this new power with his old, to form a stronger technique.

By merging his enhanced speed, enhanced strength, the hardness of his exoskeleton and his Busoshoku Haki with his pre-existing kicking techniques, he can generate even greater heat than Diable Jambe, with additional lightning, which results in increasing the weight and speed of his kicks to another level.

Techniques
An exoskeleton, muscle, and speed... all of which increase strength. Add the Color of Armanent Haki I've developed to the exoskeleton, and my legs are tougher, capable of supporting even hotter flames!!!
 * Collier: Based on the basic Black Leg Style technique and enhanced by Ifrit Jambe, Sanji delivers a kick to the neck from above the opponent. This was first seen in a series of attacks used against Queen. Collier is the French term for neck meat. This is called Collier Coup in the Viz Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo.
 * Basse Côte: Based on the basic Black Leg Style technique and enhanced by Ifrit Jambe, while still in mid-air, Sanji delivers a kick to the opponents left shoulder, immediately following up with Parlons. This was first seen in a series of attacks used against Queen. Basse Côte is the French term for shoulder roast. This is called Basses Côte Blast in the Viz Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo.
 * Palerons: While still in mid-air, Sanji delivers a kick to the opponents right shoulder, immediatelly after hitting the opponent's left shoulder with Basse Côte. This was first seen in a series of attacks used against Queen. Parlons is the French term for the chuck. This is called Paleron Pound in the Viz Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo.
 * Jumeau à Bifteck: While on the ground, it is the first of a trio of powerful kicks delivered to the torso. This was first seen in a series of attacks used against Queen. Jumeau à bifteck is the French term for brisket. This is called Jumeau à Bifteck Blitz in the Viz Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo.
 * Tendron: Based on the basic Black Leg Style technique and enhanced by Ifrit Jambe, Sanji delivers a kick while on the ground, as the second of a trio of powerful attacks delivered to the opponent's torso. This was first seen in a series of attacks against used Queen. Tendron is the French term for collar. This is called Tendron Tenderizer in the Viz Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo.
 * Flanchet: Based on the basic Black Leg Style technique and enhanced by Ifrit Jambe, Sanji delivers a kick while on the ground, as the third of a trio of powerful attacks delivered to the opponent's torso. This was first seen in a series of attacks against used Queen. Flanchet is the French term for the flank. This is called Flanchet Flayer in the Viz Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo.
 * Queue: Based on the basic Black Leg Style technique and enhanced by Ifrit Jambe, Sanji delivers a kick while performing a handstand and spinning on the ground, as the first of a trio of powerful attacks delivered to the opponent's lower body. This was first seen in a series of attacks used against Queen. Queue is the French term for tail. This is called Queue Crippler in the Viz Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo.
 * Poire: Enhanced by Ifrit Jambe, Sanji delivers a kick while performing a handstand while spinning on the ground, as the second of a trio of powerful attacks delivered to the opponent's lower body. This was first seen in a series of attacks used against Queen. Poire is the French term for tail. This is called Poire Poker in the Viz Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo.
 * Jarret: Based on the basic Black Leg Style technique and enhanced by Ifrit Jambe, Sanji delivers a kick while performing a handstand while spinning on the ground, as the third of a trio of powerful attacks delivered to the lower body. This was first seen in a series of attacks used against Queen. Jarret is the French term for . This is called Jarret Jarrer in the VIZ Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo.
 * Bœuf Burst: The culmination of a powerful combo making full use of Ifrit Jambe, the attack is a burning, shocking kick aimed at the center of the opponent's body where it blows the enemy away with a powerful spiralling explosion. This was first seen in a series of attacks used against Queen. Bœuf is the French term for beef. This is called Boeuf Burst in the VIZ Manga. This attack forms part of the Collier, Basse Côte, Parlons, Jumeau à bifteck, Tendron, Flanchet, Queue, Poire, Jarret, Bœuf Burst combo. It's name and combo may be referring this technique as an evolved form of Veau Shot from the basic Black Leg Style, as Veau (or veal) is meat from calf, while Bœuf (or beef) is meat from a full grown cow.

Trivia

 * An Ifrit is a powerful type of Angel in Islamic mythology that are often associated with the underworld and identified with the spirits of the dead. In Islamic folklore, they're a class of generally ruthless and wicked chthonic spirits formed out of smoke and fire. In modern fiction, they're almost always associated with the element of fire.