Rational thought faded as soon as Link's mind returned to his body. What replaced it was an endless chasm of hatred. Link saw everything Zant had done. How he cursed Link not to get him out of the way, but to break him. How, when that failed, he changed the curse to corrupt Link's mind. And, finally, how in desperation, he struck at what Link held most dear.
In hindsight, it made perfect sense. According to Renado, Ilia's descent into suicide had been incredibly sudden, with no apparent cause. In their collective grief, nobody paid any heed to the dark rune etched onto her skin. Nobody wondered where the dagger had come from, or why a similar rune was engraved into its jeweled hilt. Zant had not wanted to kill him. He was far too cruel for that. Instead, he wanted to make Link suffer a living death, utterly crushing his spirit until nothing remained.
All this ran through the wolf's head as it ran, its intent focused on a single purpose: to find Zant and rip him to pieces. His fangs thirsted for Zant's blood. He wanted to tear Zant's throat out like he did the Bulbin's, and watch the life fade from his eyes. Unheeding of the stabbing pain in its paw, the wolf ran. Uncaring of the burn of overstressed muscles, it ran. The enemies that lunged at it went unacknowledged, the cries of the guards on the walls of Castle Town went unnoticed. Unthinking, the wolf ran, knowing deep in its heart that Zant lurked within the castle.
Midna paused at the gate to Castle Town, unsure if she should follow Link and risk exposure. Stubborn as she was, she had followed him anyway, ignoring his warning. Hearing screams from inside Castle Town, she decided that her appearance really wouldn't make much difference, anyway. She raced into the city, following the screams, knowing they would lead her to Link.
Link raced through the city, closing in on the castle, ignoring the people that screamed and fled at the sight of him. He turned into the main square, racing towards the castle…
And stopped, a thicket of spears blocking his path. He growled at the pathetic bunch that called themselves guards, seeing several of them cringe in terror. But they never moved an inch. Link realized that he was going to have to get past them the hard way. Their death would be regrettable, but they were in his way, and that was unacceptable. Barking savagely, he leapt forward…at the exact instant Zant died.
The wolf…no…Link, stopped in midstride, screaming as the curse was irrevocably broken by Zant's death. He screamed as he felt his bones shift, lengthen and move, switching to a configuration more suited to bipedal life. He felt a horrendous itching as the wolf's fur retreated into his skin, and finally, his howl gave way to a human scream as his face and throat returned to normal.
The guards were shocked. Where a savage wolf once stood was now a young man garbed in green, who bore a shocking resemblance to the hero they had heard rumors of. This was too much for them. Throwing down their weapons, the guards ran, screaming. Link watched them go, then turned to face the townspeople staring dumbly at him. They expected him to say something, he realized. Something to comfort them, something to explain why a fearsome wolf turned into a man they all admired. Searching his mind, he found the perfect thing.
"What the HELL are you looking at?" Link bellowed.
The assembled townspeople made nary a sound, refusing to move, lest they risk provoking him. Link turned and stomped toward the castle. He knew he would regret that later, but for now, he simply didn't care. All that he cared about was that his goal was within sight.
Drawing his sword, he faced the barrier that separated Hyrule Castle from Castle Town. He reversed the blade, driving it into the barrier, putting all of his rage, sorrow and hatred into the blow. He did this at the exact moment Ganondorf decided to let him in, dropping the barrier.
Of course, to Link, it looked like he had actually destroyed it himself. Confident, he strode into the castle, prepared to fight absolutely anything to get to Zant. And after Zant was dead…well, Link really didn't really know what would happen next. He preferred not to think about it.
Link walked through the halls of the castle, making his way to the throne room. Nothing stood in his way. Anything he saw, he killed. Already, the front of his tunic was stained maroon from his enemies' blood. He fought with every ounce of skill he possessed, mixed with a wolf's instinct and fierce aggression. Against that, nothing could survive for long.
Midna charged through the castle, following the trail of bodies. Each one lay more mutilated than the last, more often than not lying in a spreading pool of blood, showing that Link had mortally wounded them and simply continued. The odd one was still alive, piteously moaning as blood pumped from the stump of a severed limb.
The piles of the dead grew more and more frequent the closer she got to the throne room. The pools of blood, clotted and sticky at first, were now fresh and still spreading. And now she could hear Link savagely screaming at those that dared stand in his way, the ring of steel on steel as he tore through them with unnatural skill. She increased her pace, stretching her limits, desperate to at least be with him in the final confrontation. Because, although she refused to admit it, she wanted to see Zant die as well.