In my version, Klaus can die because in my world, there's no such thing as the whole 'bloodlines' thing. Also in this version, Damon never force-fed Elena his blood and John never gave up his life. Also, Damon never got bitten by Tyler.
Stefan watched as Klaus drank Elena's blood. He could see that she was desperately trying to hang onto life; and was failing miserably. She looked at him with sad eyes. Still watching him, she whispered something that was meant for his ears only. Then, he saw her brown eyes close as Klaus dropped her onto the ground as if she were nothing but a doll. It was a sight Stefan had just hated thinking about. Elena, his true love, lying on the ground, her eyes closed, her chocolatey brown hair pooled around her face, her chest not rising or falling as it should have, and worst of all, he couldn't hear the wonderful rhythm of her beating heart.
He closed his eyes, not wanting to see anymore. Instead, he listened to Klaus make the painful transformation into a wolf. Soon, he heard Bonnie's chanting. When he finally reopened his eyes, he saw Damon pick up Elena's limp body and carry her towards Stefan. Damon lay her on the ground next to Stefan. "Take her back to the house, Damon."
"What about you?"
"He killed Elena, I'm not leaving until he's dead." With that, Damon picked her up again and carried her away. Right when Stefan looked back at Klaus, Elijah was already there, his hand inside Klaus' chest. Right then, Elijah ripped his now bloody hand away, Klaus' heart in his hand.
Three Weeks Later
Stefan closed the book he had been reading and set it down on the bedside table. It had already been a week since he moved into another room in the Boarding House. He had managed to live in his old room for two weeks before the memories of Elena had been too much to bear. After all, it had only been three weeks since her death; barely a month. It wasn't very easy to move on from losing someone he had loved. Damon had kept on telling him to try and move on but it was no use. He couldn't let her go, no matter how much he could try to. He got up from the bed and jumped out the window, landing cat-like on the ground below. He ran into town until he got to the Mystic Falls Funeral Home where Elena was. He quickly checked in and went inside. Finally, he got to the private room where Elena was. Stepping inside, he saw the golden coffin that was lined with blue velvet. Inside, lay Elena. Her hands were folded on her lap. On her neck, was the vervain necklace he had given to her. He unclasped it and took it off her. He needed some kind of item to help him breathe again. Taking the necklace and putting it in his pocket, he left the room and ran back home.