LUKE POV
Luke was bored. tartarus can do that to a person. "hello." Luke turned around to see a tiny kid. "how would you like to escape here and destroy your enemy, in just one easy battle? Of course you would. I propose an agreement. you kill the son of Poseidon in my world, where he is powerless, and I kill my enemy in yours. deal ?" luke shook his hand immediately. the kid had one more thing to say as luke was blinded with a bright light "my name is Gideon. welcome to gravity falls."
DIPPER POV
"WHAT IS THAT?!" Dipper shouted as he watched himself charge down the sidewalk. the stealthy attacker, looking exactly like him, held a sword in hand. dipper furiously flipped through his book, trying to figure out how to stop it. "Cyclopes - no, vampires - no, clones - water didn't work, so- AAAAHHHHHHH!" he said as he fell off the end of down town, rolling down the hill torwards the mystery shack, where Mabel crashed. Dipper, on the other hand, was not so lucky, crashing into a cave, where he fell unconscious.