Felo'melorn, Flamestrike in Common, is an ancient Highborne runeblade borne into battle by the Sunstrider dynasty. It was once wielded by Dath'Remar Sunstrider, even before the War of the Ancients. This powerful and storied runeblade, passed down through the Sunstriders for generations, is a mighty weapon said to harness the very essence of flame.
Felo'melorn is one of the artifacts used by fire mages in World of Warcraft: Legion. Equipping it will automatically place [Heart of the Phoenix] in your off hand.
Felo'melorn is obtained from  The Frozen Flame.
This section concerns content exclusive to the Warcraft novels or short stories.
Felo'melorn was eventually passed down to Dath'Remar's great-grandson, Anasterian Sunstrider, who wielded it against the Amani trolls after the founding of Quel'Thalas. It was said that a thousand Amani trolls fell before Felo'melorn's fury, spilling enough Amani blood to brim the walls of Zul'Aman. During the Scourge invasion of Quel'Thalas, Anasterian wielded the sword in battle against Arthas Menethil, and grievously wounded the death knight's steed Invincible with it. Towards the end of their battle, Felo'melorn and Frostmourne clashed, but the former was severed in two on collision. Although Anasterian fought on with his broken blade, burying it deep in Arthas' thigh, he was ultimately defeated. The shattered blade was recovered and returned to Silvermoon, along with the fallen king's body, by the brothers Solanar and Falon. Later, Kael'thas Sunstrider, last of the Sunstrider line, had Felo'melorn reforged, "with magic, hatred, and a burning need for revenge."
It was last seen when Arthas engaged Kael in a duel during the final battle between the Lich King's Scourge led by Arthas Menethil, and Kil'jaeden's agents led by Illidan Stormrage. Kael boasted that unlike human blades, which weakened when repaired, elven blades grew stronger when remade; this proved true, much to Arthas's surprise, when the runeblade was able to parry Frostmourne without failing. Though Kael ultimately fled, the sword was lost there.
After the betrayal of Kael'thas Sunstrider to the Burning Legion, Lyandra Sunstrider--a distant relative that held no actual claim to the throne--decided to find Felo'melorn. According to Aethas Sunreaver, she became obsessed with finding it. At an unspecified point, she disappeared. She apparently found the blade only to be killed and raised as a member of the Scourge by the Lich King in Northrend. By the time Aethas, Modera, and the new leader of the Tirisgarde decided to track down Felo'melorn, she had apparently been missing for years. The Lich King feels the mage's presence and tells them he will not interfere but neither will he protect them from the Scourge.
She is ultimately killed once more by the mage and Aethas, and the old elven runeblade thus falls into the hands of the reformed Tirisgarde to combat the Legion, the very group that its former owner had eventually sworn allegiance to.
Hidden trait: Certain NPCs will ask to examine the blade, granting Artifact Power when you allow them to do so. In addition, corpses of enemies you kill will sometimes be left charred and smoking.
Achievement: [Fighting with Style: Classic]
|This is the default appearance.
||Recover one of the Pillars of Creation.
||Recover Light's Heart and bring it to the safety of your Order Hall. (  Light's Charge)
||Complete the first major campaign effort with your order. (  Empyrean Society Report)
Upgraded: Pride of the Sunstriders
Achievement: [Fighting with Style: Upgraded]
Valorous: Phoenix's Rebirth
Achievement: [Fighting with Style: Valorous]
War-torn: Lavaborn Edge
Achievement: [Fighting with Style: War-torn]/ [Fighting with Style: War-torn]
Challenging: Timebender's Blade
Achievement: [Fighting with Style: Challenging]
|Complete the quest line, "Imp Mother Challenge."
||Defeat Heroic Kiljaeden after unlocking a challenge artifact appearance.
||Win 10 rated battlegrounds after unlocking a challenge artifact appearance.
||Defeat all Legion dungeon bosses after unlocking a challenge artifact appearance.
Hidden: The Stars' Design
Achievement: [Fighting with Style: Hidden]
Arcanomancer Vridiel examining Felo'melorn.
Certain NPCs will react to the mage wielding Felo'melorn, asking to examine the blade and granting 50 Artifact Power.
In the RPG
This section concerns content exclusive to the Warcraft RPG and is considered non-canon.
Flamestrike is a large double-edged warblade, etched with elven runes of power. It is rumored to have once been Dath'Remar's favored weapon, and over many generations was passed down through the Sunstrider dynasty. Flamestrike grants its wielder an increased chance to hit, increased damage, and an increased chance of scoring a critical hit. It adds fire damage to every attack (more so on a critical hit) and also allows its wielder to cast the flame strike spell five times per day.