Kagero (陽炎 Kagerō?, literally meaning "Heat Haze"): Ace shoots a stream of fire from the palm of his hand. This was first seen being used to stop Smoker from catching Luffy.[1] This is called Sun Flare in the Viz Manga and Heat Haze in the FUNimation dub.
Hiken
Ace unleashing the "Hiken" against the Blackbeard Pirates.
Hiken (火拳 Hiken?, literally meaning "Fire Fist"): Ace's apparent signature attack and the source of his nickname "Fire Fist Ace". Ace turns his fist into flames and launches it as a column of fire at his target. This attack is so incredibly powerful that it is able to plow through several ships in one shot.[4] However, it was completely neutralized by Akainu's Dai Funka. This is called Fire Fist in the Viz Manga and FUNimation dub and Heat Fist in the 4Kids dub.
Higan (火銃 Higan?, literally meaning "Fire Gun"): Pointing the index and middle fingers of both hands at an opponent like guns, Ace turns his fingertips into flames and shoots bullets made of fire from them. This technique was first seen when Ace retaliated against Van Augur's attack.[7] In the Viz Manga and FUNimation subs, this is called Fire Gun.
Enkai (炎戒 Enkai?, literally meaning "Flame Commandment"): Ace amasses a large amount of flames around his body (usually by first swinging his outstretched hand around him, summoning the flames) in preparation for an attack. This is apparently the prerequisite technique before Ace can use Hibashira. In the FUNimation dub, this technique keeps its original name, and in the Viz Manga, this is called Flame Commandment.
Hibashira (火柱 Hibashira?, literally meaning "Fire Pillar"): Used following Enkai,. Ace shoots the collected flames straight upward, destroying a target above him. It can also be fired downwards to clear any enemies that might be below him while he's in mid-air. This technique and its prerequisite technique were first seen when Jesus Burgess threw a hotel at Ace.[7] In the Viz Manga and FUNimation subs, this is called Fire Pillar.
Hotarubi
Hotarubi.
Hotarubi (蛍火 Hotarubi?, literally meaning "Firefly Light"): Ace creates many small, glowing greenish yellow fireballs that float around an enemy. The idea behind this attack's name is that before he attacks with them, the small fireballs look like fireflies in the air. This move is apparently used in preparation for Hidaruma and was first seen in Ace's battle against Blackbeard. In the Viz Manga and FUNimation subs, this is called Firefly.
Hidaruma (火達磨 Hidaruma?, literally meaning "Fiery Doll"): After using Hotarubi to send the fireballs floating around in proximity with the enemy, Ace sends them all flying into the target(s) all at once, burning them. This was first seen being used in Ace's battle against Blackbeard after Blackbeard performed his initial attacks.[13] In the Viz Manga and FUNimation subs, this is called Fiery Doll.
Shinka: Shiranui (神火 不知火 Shinka: Shiranui?, literally meaning "Sacred Fire: Mysterious Light at Sea"): Ace hurls long lances made out of fire. The lances have the combined effect of simultaneously burning an opponent while piercing them. This was first seen being used against Blackbeard when Ace was being pulled forward by the former's power.[7] In the Viz Manga and FUNimation sub, this is called St. Elmo's Fire.
Jujika (十字火 Jūjika?, literally meaning "Cross-fire"): Ace puts his index fingers together in a cross shape before launching a cross-shaped column of fire directly at his opponent. In the anime, after crossing his fingers, a cross-shaped ray of light can be seen emanating from the fingers at the target followed by the column of fire. This was first seen being used against Blackbeard after Ace attacked him with Shinka: Shiranui.[13] This attack's name is a pun since "Jujika" refers to crossfire from weapons, yet Ace is making an actual cross out of fire. In the Viz Manga and FUNimation subs, this is called Cross Fire.
Daienkai Entei
Ace's ultimate technique, "Dai Enkai: Entei".
Dai Enkai: Entei (大炎戒 炎帝 Dai Enkai: Entei?, literally meaning "Great Flame Commandment: Flame Emperor"): Ace's ultimate technique. After creating great spiraling flames centered on his location before amassing it at a focused point (i.e. the palm of his hand), Ace then turns it into a gigantic fireball resembling the sun and hurls it at his opponent to try to obliterate them. This was only seen being used during the final moments of Ace and Blackbeard's battle.[13] "Entei" is a homonym with "Enkei" meaning "circle," a reference to the attack's shape. In One Piece: Unlimited Cruise, Ace activates this move by first bending his knees slightly and then placing the outstretched palm of his hand towards the ground (with his other hand gripping the wrist for support), where the flames manifest themselves into a sphere. In the FUNimation dub, this technique keeps its original name, in the Viz Manga, this is called Great Flame Commandment: Flame Emperor, and Flame Commandment: Flame Emperor in the FUNimation subs.
Enjomo (炎上網 Enjōmō?, literally meaning "Flaming Net"): Ace creates a circle of fire around a selected area, preventing anyone from entering or leaving it. This was first seen being used against the Marines in Alabasta under the command of Smoker,[4] and was named in a flashback against Whitebeard.[10] In the Viz Manga and FUNimation subs, this is called Flame Fence.
Kyokaen (鏡火炎 Kyōkaen?, literally meaning "Mirror Flame"): Ace releases a wall of fire to block an attack. This was first seen to counter Aokiji's Ice Block: Pheasant Beak, the two attacks canceling each other out. In the Viz Manga, this is called Mirror Flame and Flame Mirror in the FUNimation sub.