A Vampires Tale of Olympus

Intruder Alert!!!

The journey to Camp Half Blood was long and tiresome. But it was worth it. The vampiress had gathered poisons of all sorts, because there was one big issue in her fool proof plan. Thalia's tree.
Thalia's tree was in the middle of Katherine and the children of the Big 3. That's why she brought poisons, to kill the tree, or at least weaken it, so Katherine could get past.
As she stepped through the towering forests, she saw her obstacle; the tree.
Quickly, Katherine began to work. She poisoned the tree with eight different poisons. You could see the damage to the tree.
And then Katherine looked at the weakened barrier and plunged her fist into it. BOOMPH! BOOMPH! BOOMPH! Each knuckle hitting the invisible wall was like an earthquake. BOOOOMPH!!!! The last punch had been hit: and now the barrier has been shattered into thousands of pieces.
Katherine made her way through the frills of Camp Half Blood until reaching the camp fire.
She made her way into the centre where she yelled, "Has anyone seen Perseus Jackson, Jason Grace and Nico Di Angelo?!"
A confused look spread around the camp like the plague, each one murmuring wondering what was going on and who she was.
"What do you want with us?" The children of the big three stepped forward. "And who are you?"
"Oh how rude of me," she rolled her eyes, "My name is Katherine Piers, and well, what I want from you three is a secret." She stepped forward and whispered in Percy's ears, "I want to make you three immortal." She stepped away turned around threw some dust at them and it knocked them out. Now this wasn't normal dust, it was a herb.
She gathered the bodies until one camper stopped her. Katherine made it obvious that she was annoyed so she swiftly took his heart out.
"Please enlighten me, who's next?"She looked around, "no one? Ok then I'll just be on my way."
And she took the bodies to the Petrova house.