Ok, this is easy, though I would like to see some creative ways to get the title, you can simply put 'MY HILL' in your post, though I will look down upon you for it.
Simplicity at its best here, simply keep the hill, the first posts MY HILL, the next MY hill, and no matter what those two words MUST be in your post to have it. I will start.
Storms to the top of the hill, plants her flag in its peak and exclaims "MY HILL" Glares at all who oppose her.
Sneaks up behind Kiara, pushes her off, throws down her flag, plants his, and proclaims "My Hill Now!"
Rolls down the hillside cursing his name, then stands, dusts herself off and then after a few long hours gathers a horde of ninja's and then re-storms the hill, with Ninja's in tow and beat Neo off the top, breaks his flag and tosses it after him, replants her flag and giggles delightedly.
"MY HILL!"
Pays the Ninja's and lazily kicks back watching the clouds roll by on her hill.
Watches with intrest, laughs hysterically and points at the hill.
"Not My Hill."
Glares at Gin "YOU SAID THE WORDS!" Lets her have it but then runs back and exclaims "MY HILL"
Pops a few Advil to help with the pain Kiara inflicted, and tries to figure out a way to reclaim the hill. Runs away and comes back a few hours later flying a b-52, bombs Kiara and her flag off of the hill, parachutes out of the plane, lands on the hill, plants his flag and yells "MY HILL!"
After fleeing at the site of the bombers, Kiara hides out for a day or two to recoup her losses and after developing a new flag she returns to the hill. She giggles with delight as one stealth bomber prowls the sky and sneaks up on Neo then blasts him off her hill. She skips up the side, tears away and snaps in half his flag then plants her new one exclaiming., "MY HILL!"
In the woods Harry makes a muggle missile. He launches it and blows Kiara off the hill.
"Sorry sis, but My Hill!" he says as he build a large wall around the hill with missiles all around.
Digs under his wall, into the hill, and up to the top of it, gets out, burns his flag and plants his again. "MY HILL!"
Kiara shakes off the blown away thing like it was not but water, watches Neo retake the hill and then she calls on the forces of heaven and unleashes Giant snakelike bolts of lightning that strike down the wall and Burn Neo out of his comfy position and then, like the girlie she is, she regrows the plush green of her hill complete with pansies and wild flowers then marches up, plants yet another new flag and exclaims once more "MY HILL!"
Harry summons up his power of wind and starts to bombard the hill his gale force winds blowing Kiara away. He floated up and planted his flag.
"My Hill!" his voice boomed.
Neo nukes the hill, blowing away Harry and his flag, and vaporizing the hill. Neo climbs down into the pit thats left, plants his flag. "MY HILL! Or whats left of it anyway!"
Being the creator and keeper of the planet she is, Kiara re-grows that hill in a matter of mere minutes and then, after Neo has been shaken off by the growing process she storms back up it again and snaps his flag once more than replants her new one and exclaims... "MY HILL"