Bill let Dipper in and they were having a small snack before training.

While eating, Dipper remembered about asking Bill about changing his clothes back to normal.

"So are you ready for your next lesson Pine Tree?" Bill asked, while sipping a cup of tea.

"Yeah," Dipper answered "But I was wondering if there was a way to-"

"Keep your questions till the end of class Pine Tree." Bill interrupted, as he snapped his fingers and teleported them deeper into the cave.

"Today you'll be learning how to summon objects!" Bill said, as he snapped his fingers, summoning an apple and threw it at Dipper.

Dipper caught it and took a bite out of it.

Dipper seemed puzzled, "How can a red apple taste like a green one?"

"That's the thing about 'dream-demon' magic Pine Tree, it's all connected to your mind and what you imagine. An object can look and act however you want it to, even if it's not what it seems."

"But what's the point of it all?" Dipper asked.

"There is no point! That's what's so fun about it Pine Tree! You can make a cat bark, or make fire feel cold, the possibilities are endless! Now you try it."

Dipper sighed, "Alright, but what should I make?"

"Anything you want, but I advise to keep it simple."

Dipper thought about it and remembered his old pine tree cap.

He closed his eyes and snapped his fingers.

"Cap, cap, cap." is what repeated in his head.

He opened his eyes and saw that nothing happened.

He checked his head, but all he felt was his hair.

"Pine Tree, it doesn't work like that." Bill said, shaking his head.

"But I thought of my cap and nothing happened!"

"That's because all you were doing was saying 'cap, cap, cap'. You also have to think about what you want it to look like and what it will be. What color is it? What size? Is it alive, or not? Then the picture will be clear and the object will pop up."

"Oh! I understand now."

Dipper closed his eyes and thought of a medium sized blue and white cap with a pine tree symbol in the middle.

He then snapped his fingers and...

Poof

Dipper touched his head and felt his cap.

"Yes! I did it!"

"Good job Pine Tree!" Bill said, congratulating Dipper.

He then snapped his fingers and made Dipper's cap disappear.

"Hey! I made that myself!" Dipper said a little angrily.

"I saw what you were doing there kid, but that's not who you are anymore! You're now Dipper Pines, the dream-demon!" Bill said as he ruffled Dipper's hair.

"But I don't want to be-"

"Enough said, let's continue!"

Bill snapped his fingers and Dipper was suddenly in a large cage.

"Hey, what's the big idea?"

"Your goal is to get out of there by using what you learned today."

"Pssh, this will be easy." Dipper laughed, "I can just teleport out of here!"

He snapped his fingers but just popped up back into the cage.

"What the-"

"You think I'm THAT stupid Pine Tree? Now use what you learned TODAY."

Dipper sighed and rolled his eyes, "Fine, lets do this."

===============================

For the rest of the afternoon, Bill gave Dipper tasks and problems to solve so he could get used to thinking up stuff quick on his feet.

For his last task, Dipper was put on a small platform being held up by a pole that was up 15ft in the air and he had to try to get himself down without teleporting.

"Come on Pine Tree! You don't have all day, you need to get home soon!" Bill yelled.

"I- I don't know what to do!" Dipper yelled back, holding on to the pole in fear.

"Don't tell me you have a fear of heights Pine Tree! You're supposed to learn how to levitate tomorrow!"

His sister HAD recently gotten a fear of heights and Dipper started to think he had it too.

Closing his eyes, Dipper hugged the pole tighter and nodded his head.

Bill whispered under his breath, "Ugh, I can't believe I'm about to say this."

Bill sighed and yelled to Dipper, "Well you gotta think of something kid, cause I'm not gonna help you down! Just think of something that makes you happy and it'll help calm your nerves!"

"Something that makes me happy?" Dipper thought.

Dipper imagined his sister by his side and she was cheering him on.

"You can do it Dipper! I believe in you!"

Dipper smiled, opened his eyes, and took a deep breath, "You can do this Pine Tre- I mean Dipper!"

Dipper thought of the stairs that led to the attic in the Mystery Shack and snapped his fingers.

Poof

Dipper nervously walked down the stairs and met Bill.

"Good job Pine Tree, you did it!"

"Yeah, I guess I did!"

"Now that we're done for the day, what was that question you had for me at the beginning of class?"

Dipper scratched his head, trying to remember what he was going to say.

"I- I don't remember. I think it was about my clothes? But, I don't see why I would want to change out of this!" Dipper said, admiring his black and yellow outfit.

Bill let out a sly grin, "Well I'm glad you're already getting used to your new outfit kid."

"Now go home and I'll see you tomorrow." Bill said as he pushed Dipper out of the cave.

"Fine, fine! I'm going!"

Dipper snapped his fingers and teleported himself back to the Mystery Shack.

Bill sighed and then let out a demonic laugh, "As he grows stronger each day, the closer he is to joining me. And soon we'll become unstoppable!"