Arthas only.

After the two invasion forces left to their targets Arthas returned to the Frozen Throne.

Ever since he pierced Elsa with Frostmourne he could stop feeling about that emotion he felt.

He sat down and entered his dream-like state letting the ice of the throne encase him. He was once again in the Tanuka great hall, with the Tanuka Shaman dancing around the fire and him sitting at the table in the back.

But Arthas quickly realised he wasn't alone.

"You! I killed you!" exclaimed Arthas.

The being to which he was addressing was a small sickly child who looked as if he had not eaten in weeks. Yet the child sat at the table with perfect posture and showed no signs of weakness in his pathetic state.

"Yes you did." stated the boy, "I was the remnant of the little love left inside you. The love for your father, for Jaina, and for your people. But perhaps something else has given me reason to manifest within you again. A certain woman perhaps."

"You can't possibly mean Elsa." replied Arthas.

"Oh, but I do." the boy said with a snide tone "You know it's true also. The moment you pierced her with your sword was the moment I awakened once again."

Arthas only responded with an irritated grunt, then looked to his left.

"Ner'zhul has not returned though." said Arthas as he noticed the lack of an ambitious Orc with a skull painted on his face.

"Of course." said the boy "Unlike me, he was an actual soul. Not a sub-conscious. He will never return."

Arthas betrayed himself with a sigh of relief. He really did not want to deal with Ner'zhul again. That Orc knew too much and may have been able to posses Arthas entirely rather than merge with him.

He then returned his gaze to the sickly boy.

"So you are telling me I 'love' Elsa?" asked Arthas.

"Possibly." responded the boy "Or perhaps you just see her as an important friend. All that is for certain is that there is a new person in your life that you genuinely care for. A new chance."

"Why shouldn't I just purge the emotion by stabbing you again?" Arthas asked in a slightly sadistic tone.

The boy's eyes widened a little, he certainly did not want to be impaled a second time.

"You shouldn't because this new found caring cannot inhibit you. She has already become a fiercely loyal soldier of yours. Unlike the love I represented last time, this one is not someone you will have to harm." stated the boy.

"His logic is sound." Arthas thought to himself.

"I will spare you then." Arthas began "but the second you get in my way for even the most trivial thing I will dispose of you once and for all."

The boy smiled and the Great Hall slowly melted away and Arthas returned to reality.

He had no idea how much time passed. It could have been minutes, it could have been days.

Arthas descended the Icecrown Glacier and traversed the citadels halls but soon bumped into a face he had gotten used to seeing. A slender woman with white hair and wearing rune covered armor stood attention in front of him.

"The objective has been met my lord." Elsa stated "Orgrimmar has sustained massive collateral damage and the Horde soldiers suffered many casualties.

Arthas smiled at the news.

"However," Elsa began.

"Always a catch isn't there?" Arthas thought to himself.

Elsa continued "Very few of our forces survived the battle only the necropolis remains."

"I expected as much. The Horde and the Alliance are forces to be reckoned with. Which is exactly why I wanted the first strike." Arthas stated. "They will come for us now, and we will be ready. The Scourge defense will trample their efforts and leave their homes utterly defenseless. But before that happens there is one thing I need to accomplish. I will be leading this final offensive endeavor myself, and you will spearhead it." Arthas finished.

Elsa had a look of confusion on her face.

"We will use the heroes of Azeorth to spawn more Death Knights like you. They won't be as powerful, but they will be fierce and they will be exactly what we need to pull the Paladin named Tirion Fordring out of hiding."