Entering upon the deepest shadowed chambers of the dungeon fortress; Illidan quickly notices a weak yet conscious Akama locked inside a magically sealed cage cell in the corners of the room. Illidan was about to approach the locked up cell and free the Draenei Elder Sage when suddenly, a familiarly deep and horrifying voice of laughter sounded from out of nowhere. Illidan instantly recognized as the voice, as he was not mistaken of what he expected all along. Coming out from the shadows; the death knight Teron Gorefiend finally reveals himself as he is the one that Illidan and Lady Vashj have been sensing within the chamber. With the dark unholy presence of the death knight, Illidan was right on his thoughts all along that it was Teron Gorefiend he had been sensing.
Teron: "You made it here at last, Illidan. So predictable of you, we all expected you would come."
Illidan: "Gorefiend! Just as I suspected. I knew it was you in here all along with your foul unholy presence! Your reeking stench of death! A vile creature like you has no place amongst any world!"
Teron: "Tell me something. The scar upon your chest, how does it feel? The cold embrace of death slowly taking away your life-force, and slowly consuming you within. Do not worry, Illidan, for I shall quicken up the curse of death in you. I shall finish what the champion of Ner'zhul had started. As you know, we share the same dark powers of death, and also, here in my hand is the scepter of Sargeras himself, given to me by Lord Kil'jaeden. This staff is what cause this world's destruction. If you could not beat a mere human boy, what chance do you have against me with this artifact?"
Illidan: "You are nothing more, but a pathetic restless orc ghost on a dead human flesh! I may have regrettably failed against Arthas, but you will have to suffice. You may have that staff, but I possess the powers of your creator, Gul'dan. It is fitting that I should end your damned existence with it!"
At that moment; the one-on-one battle between Illidan Stormrage and Teron Gorefiend officially begins with Illidan quickly and aggressively charging against Gorefiend. Teron isn't a physically strong and agile fighter like Illidan, and unlike the death knights of the Lich King, Gorefiend and the other death knights that were created by Gul'dan lack skills for a physical combat. However, the death knights of Gul'dan were created with greater dark magical abilities, as Teron himself is not only the first, but also the most powerful one as well. In addition to his considerably dreaded powers; Teron had been further empowered by the demonlord Kil'Jaeden, when he and the other few surviving death knights of Gul'dan renewed their pledge of allegiance to the Burning Legion after the destruction of Draenor. Teron Gorefiend now officially stands as one of the remarkably powerful agents of the Legion, and direct servant of Kil'jaeden that had been sent to end Illidan.
With Illidan's fierce attempt of slaying him off quickly; Teron immediately blasts a full powered Death Coil, which instantly harms the demon hunter. The death knight then casts his necromantic spell of raising the dead bodies of the fallen draenei warriors around the chamber into his undead skeleton minions. Empowering the skeleton warriors with his Unholy Haste spells; Teron directs his undead warriors to attack the demon hunter. Illidan battles all the skeleton minions of Teron, and defeats them with the help of his Immolation spell, which engulfs his body in flames burning all near enemies to him. Illidan is also able to evade some of the attacks upon him with his agility and elusiveness. Illidan quickly runs towards Teron and casts his Mana Burn spell upon the death knight, which sends a shadow bolt that consumes away some of Gorefiend's magical energies, as well as inflicting some damage upon the death knight. Upon directly receiving a significant harm from Illidan's spell and combat attacks; Gorefiend casts another necromantic spell upon himself known as the Unholy Armor, which is an unearthly, phantasmal armor that absorbs damage from attacks for a time being. With his spectral armor; Teron thinks onto himself that he is invincible.
Illidan: "Let me ask you, Teron! Does a filthy living corpse like yourself, ever experience fear?!"
Illidan uses his ultimate spell of Metamorphosis, and transforms himself into a powerful demon. Magically mutating into a dark fiery monstrous demon imbued with such terrible chaotic powers; Teron Gorefiend instantly felt astounded yet horrified upon directly seeing the powers of Illidan. Inside the magically locked prison; Akama is amazed upon barely witnessing the battle between Illidan and Teron. With the powerful chaotic attacks of the demonic mutation of Illidan; the dark spectral invincibility armor of Gorefiend easily breaks, as he then receives such seriously painful damage from the heavy devastating attacks of the demon hunter. Going on against a demonically empowered enemy; Teron Gorefiend desperately casts another Death Coil spell on Illidan, which was futile as it did little harm on the demon hunter. Illidan sends another bolt of Mana Burn upon Teron that burnt out the last of the energies of the death knight and inflicted a great harm on him.
Teron: "No! But, my powers… The scepter has failed… How?!"
Illidan: "Die, fool!"
Teron Gorefiend has been severely harmed and weakened in his fight with Illidan. An inevitable defeat is upon Teron, as Illidan has the overall upper hand in their battle. The nearly dying death knight now stands merely defenseless against the fiercely mighty demon hunter. Illidan viciously strikes down Teron Gorefiend with his warblades as a last killing blow upon the death knight. The dark unholy essence and powers of Gorefiend have completely dissipated as he is now vanquished. Standing victorious; Illidan successfully killed the very first death knight of the old Horde, Teron Gorefiend. The demon hunter uses a magical fire spell of his to burn out all the foul remains of the death knight into ashes. Illidan then took the Jeweled Scepter of Sargeras, and shattered it to pieces. Right then; Illidan destroys the magically sealed cell and frees up Akama, at the same time, Lady Vashj enters the chamber to check on her master after witnessing his battle and glorious victory.