Although Sha Varian Wrynn possessed near-immortal regenerative abilities, he could not withstand so many powerful foes.
Especially Gorehowl in Grommash Hellscream's hand. The battle-axe had absorbed the life force of Kil'jaeden the Deceiver and possessed the ability to annihilate life itself.
Once Gorehowl's life-annihilating effect was triggered, the heroes unleashed their powerful abilities all at once.
Sun King's Wrath, Illidan's Eye Beam, Nature's Wrath, Phase Punch, Infinite Shattering, Wrath of the Gods...
Even Sha Varian Wrynn could not endure so many attacks. His shattered body collapsed to the ground.
Now that the greatest obstacle before the Heart of Y'Shaarj had vanished, all the heroes turned their eyes toward the culprit who had dragged them into the Black Empire: the heart of Y'Shaarj, an Old God.
"Actually, I should be thanking you. My resurrection was missing only one final element: a body! Now that you have defeated Varian Wrynn, his body will be mine!"
Humans were a race born from the Old Gods' Curse of Flesh. From the moment Vrykul devolved into humans, they were no longer metallic constructs of the Titans, but flesh-and-blood beings like the Old Gods themselves.
The Curse of Flesh had been created by the Old Gods using their own bodies as a blueprint. In other words, under certain circumstances, races born from the Curse of Flesh were extremely similar to the Old Gods in their physical composition.
Y'Shaarj had long set its sights on Varian Wrynn's body. With only a heart remaining, it needed a new body in order to resurrect.
However, even Varian Wrynn's body—the pinnacle of humanity—could not meet the needs of Y'Shaarj, the seven-headed Old God. To fulfill those needs, it had used Varian Wrynn as a vessel, pouring the most primordial Sha energy into him to create the ideal body for itself.