There isn't much that brings shock to Klaus anymore. He has lived far too many lifetimes to be surprised by anything or anyone. The curse of eternity is the absence of wonder; he now knows why the people he was born into worshipped the gods they did, why each story had a purpose, why the seasons change. None of it is mystical or spiritual at all -- even though at one point in his life, he truly believed it so.
Klaus no longer expects good from people, either. People are deceiving, and only serve their own purposes. He is one of those people. Which is why Klaus is not shocked in the slightest to find Elena alive and well after he has spent months attempting to find werewolves to turn into hybrids, only for them to die shortly after. Her living through the ritual was never supposed to happen, and now Klaus's entire plan is ruined. His goal for the last thousand years has been rendered utterly useless by this band of teenage sycophants and their baby vampire protectors.
It angers him, but it does not shock him.
There is one aspect of the current situation that has managed to surprise him, though. There is something different about Elena's presence that he cannot place. Klaus managed to know exactly where she was in town the moment he arrived, and not because of an educated guess. He knew precisely where she was, and could feel her presence the moment he stepped foot in the same building. It's how he managed to take her by surprise so easily, as ironic as it is.
Even now, as he waits for answers from the witch, Klaus can sense every move Elena makes before she makes it. His eyes follow her, study her, even as she is unaware of him doing so because she is so focused on Stefan. There is something different here, but Klaus is not going to focus on it when there are other more pressing matters at hand.
It's only after the situation is resolved that he finally allows his mind to drift back to the shift he'd felt. Stefan is fixed, Tyler is a hybrid, and Elena is safely tucked into a hospital bed as her blood is drawn for him. The smell of it is far more potent to him than it had been when he'd drank from her that night, and he only has a moment to ponder on it before he senses her waking from her sleep. He senses it well before it actually happens, which has him tilting his head at her as she wakes.
"Careful, love," he says, questioned look still on his face as he stands over her. "You're now precious cargo. But what do you say we have a little chat, hm? I've some questions for you, if you don't mind."