Invincible Invincible was the steed of Arthas Menethil , both in life and death . He was the skeletal steed that Arthas rode throughout " " and " " . Biography . Invincible was born to the mare Brightmane on the Balnir Farmstead in Tirisfal Glades , in the winter of the year Stormwind fell . Prince Arthas , then nine years old , was present when he was born , and was given the horse by the Balnir family , who bred horses used by the royal family . The horse had a white coat , different from the usual Balnir stock , which normally had gray coats . Arthas had considered naming the horse " Snowfall " or " Starlight " , but in the informal tradition of Lordaeron knights and nobles naming their steeds after a quality ( Uther ' s was " Steadfast " , King Terenas ' " Courageous " ) , he named the colt " Invincible " . Ten years later in winter , before Arthas was inducted into the Knights of the Silver Hand , Arthas and Invincible were caught in a sudden blizzard while en route to Balnir Farmstead . When Arthas came to a jump that Invincible regularly makes , the horse lost its footing on the ice ; propelling the young prince and his mount into rough terrain . Arthas blacked out for mere moments , but his steed was laying in the bloody snow with two broken front legs . Too far from help and unable to heal the wounded horse , Arthas forced himself to drive his sword through the beast ' s heart in order to relieve his pain . After the storm tapered off , Jorum and Jarim Balnir found the young prince curled up next to his once majestic mount . Stricken by a mix of guilt and pride , Arthas didn ' t tell anyone that it was a completely unnecessary jump that lead to the accident . He was buried on the grounds of the Balnir Farmstead at Arthas ' request . Invincible ' s death was one of the events that inspired Arthas to become a paladin . After the fall of Lordaeron years later , Arthas - now a death knight - ran directly from Lordaeron after murdering his father , to the Balnir Farmstead where Invincible was buried . With the power of Frostmourne , Arthas resurrected the horse as his undead steed . Now fully living up to his name , Invincible could become a spectre and disappear , to be resummoned by Arthas at any time . During the Scourge ' s siege on the Sunwell , Anasterian Sunstrider confronted Arthas in single combat , severing Invincible ' s forelegs with his runeblade , Felo ' melorn , to dismount him . Witnessing Invincible ' s injuries brought on a surge of memories and sent Arthas into a rage , during which he shattered Felo ' melorn and struck down Anasterian . This time , however , Arthas was able to necromantically repair the injuries . It is likely that Invincible still serves as his master ' s steed , even after Arthas became the new Lich King , though Sindragosa has also been referred to as his mount . In World of Warcraft . In " World of Warcraft " , Invincible ' s empty grave can be found at the Balnir Farmstead in Tirisfal Glades : The open grave was introduced in Patch 3 . 0 . 2 , " Echoes of Doom " , but went unnoticed until just before the Zombie Infestation phase of the Scourge Invasion , which heralded the release of " " . However , " " indicates that the grave had already been open for several years . In Wrath of the Lich King . When defeated " in his strongest form " on heroic difficulty in 25 - player mode only , the Lich King will drop Invincible as a flying mount called the Invincible Charger . Media . Music . On January 22 , 2010 a music piece titled " Invincible " was released on the WoW 5 Years Anniversary Battlecry Mosaic : The song largely revolves around a recurring lyrical leitmotif , " " An Karanir Thanagor , Mor Ok Angalor . Mor Ok Gorum Palahm Raval " " which can also be heard in the closing cinematic of " " and in the opening cinematic of " . "