Mabel and Gideon came to the mansion. McGucket was already at the gate.

McGucket chirped, "Well, howdy, ya'll! Got your fancy text mail, dizzy-ma-do! Come on in; I've got it all set up!"

He opened the gate and Gideon and Mable came to the courtyard.

Mable asked, "Got what set up?"

They came into the mansion and saw Wizard Bill tied up in the middle of a zodiac circle.

Bill chirped, "Oh, hey, guys!"

Mable gasped.

"Oh my," Gideon quipped, "Getting your revenge early, I see."

McGucket chuckled, "Yep! We're finally going to be rid of Cipher once and for all!"

"What," Mable asked and said, "No, that's not what's going on! We're gathering the Zodiac to get Wizard ready for the greater multiverse and stop Rephic's evil plan to merge all the Bills into Prime."

Wizard asked, "Wait, what?!"

Mable untied Wizard and said, "Yeah! It was Teddy Cipher's idea!"

Wizard asked, rubbing his wrists, "You're seriously trusting a version of evil Bill Cipher with anything?"

Mable said, "He got hit in the head with the Staff of Chaos!"

Wizard seemed unsure.

Mable asked, "Weren't you an Evil version of Bill Cipher once? If you can change after 333 lifetimes, what's stopping the others?"

Wizard smiled, "You're right, Mable. I should be more optimistic."

McGucket asked, "Can I at least hit this one with my hat?"

Wizard asked, "Why didn't you do that before?"

McGucket said, "I'm a crazy old man, no thanks to you!"

Wizard sighed, "Whatever, Fiddleford."

Suddenly, a loud rhythmic bumping cut into the mansion. Robbie kicked down the front door, wielding his guitar. He slid on his knees.

Robbie sang as he shredded, "I have arrived!"

Wizard cheered, "Woo! Nice entrance, Robbie!"

Robbie stood up and said, "Thanks! I still feel so energized from our concert together. We should do that again, or, you know, get together and hang out casually. I'm down with whatever, man."

He slung his guitar over his back.

Wizard said, "I'd like that. But Stanford is repairing the portal he damaged. We probably don't have a lot of time."

McGucket panicked, "Stanford's doing what?!"

Gideon asked, "Are you just not paying attention, old man?"

McGucket shrugged, "Sorry, Having your mind in fragments will do that to ya!"

Wizard said, "Okay. So, to catch you up, Glasses, Sixers is going to rebuild the portal to stop Rephic. If he gets enough power, he can free Prime from wherever he's being imprisoned, and when their magic is all merged into one, it will destroy the multiverse! So basically, a Gravity Falls-flavored Crisis on Infinite Earths."

McGucket asked, "Is Crisis on Infinite Earths another anime do-hicky?"

Wizard bluntly said, "No."

Gideon asked, "Where's everybody else? I sent a mass text to the whole Zodiac!"

Pacifica came in with a sour scowl, "I'm right here, Gideon. For the record, I am not wearing that mangy old lama-hair sweater all day. I got a better accessory. Check it out."

She gestured to a bedazzled brooch on her shirt.

Mable gasped, "So shiny!"

Wizard was also amazed, "So sparkly!"

The two of them held hands as they squealed, "So cool!"

Bill quickly let Mable go, his face a bit flushed.

Bill said, "Hey, Gideon, get in on this admiration!"

Gideon scoffed, "It's good-looking, I guess."

"Come on, my little sweetie," Mable addressed Gideon, "How can you not like sparkly brooches?"

Gideon said, "It's okay, I guess. It's not as great as the one I got you!"

Mable gasped as she laid eyes on a Shooting Star brooch in Gideon's hand. She grabbed it and pinned it to her sweater.

Wizard said, "Wendy, Soos, and you're grunkles should already be at the shack. Oh, but that barrier, I won't be able to come in. Darn, guess me and Robbie can hang out after all."

Robbie cheered, "Yes!"

Mable said, "No, wait, Wizard. That's just the thing! You can get in the barrier! Because you're weaker than regular Cipher!"

Wizard was a bit nervous now, "What? That's crazy talk, Mable!"

Mable said, "I'll prove it!"

Mable grabbed him, and they all piled into Robbie's car and drove to the Mystery Shack.

Wizard asked as they went, "Is this really necessary?"

Mable was still holding his arm and said, "You'll see! Everything's going to be great!"

Gideon glared at him enviously. Wizard was frightened.

Wizard snapped, pulling his arm away from Mable, "What am I, Five? I don't need to be held!"

Mable pouted.

McGucket was watching them through the rearview mirror with intrigue. Pacifica was watching the town move in the window, decidedly disinterested in the drama.

They stopped when they got there.

McGucket said quickly, unbuckling his seatbelt, "Last one there is a broken banjo!"

He charged out of the car; Robbie unbuckled and chased after him, saying, "Hey, no fair old man, you had a head start!"

He chased after McGucket.

Pacifica hopped out and said, "Hey, Wait for me!"

Gideon took Mable's hand in his. Affection flooded Mable's mind, and she couldn't help but get out of the car with Gideon. Wizard was dead last, unbuckling and getting out of the car. He followed them right to the edge of the barrier. Gideon had Mable's arm in a tight hug. Mable felt conflicted again; her affection for Gideon was clouding her desire to be helpful.

Mable cooed, "Gideon, my sweet little pear, will you let me help Wizard?"

Gideon rubbed his nose against hers as he replied, "Sorry, my loyal little lamb, but no, Wizard needs to do this himself."

Wizard said, "It's okay, really, guys. You go on without me. I'm sure Sixers will understand."

Mable turned to Bill, "But Wizard."

Wizard sat on the ground, waving his hand dismissively, and said, "Go on, Mable. I'll be fine out here, alone."

Mable suddenly felt a squirt of liquid splash her. All the affection she felt for Gideon drained in a single instant. She quickly yanked her hand away from Gideon's grasp.

Mable snapped at Gideon, "How dare you?! I thought you were a changed boy, but you're still just as selfish and heartless as I remember you! I won't give up on Wizard if it means I don't have to deal with you!"

Gideon was shocked, as well as Bill. Mable then went to Wizard.

Wizard asked, "What the heck was that all about?"

Mabel said, "I don't know. One moment, I felt like I couldn't leave Gideon's side, and the next, I couldn't stand to be near him."

Wizard spotted the Love god and muttered, "That son of a.."

The Love god blew a raspberry at Wizard.

Bill took a deep breath and said, "Don't overthink it. Look, Mabel, I really don't want to go back in that shack. I sense all kinds of Weirdness calling me from it, and I'm just not ready to go back to being that geometric jerk who almost killed you and your whole family."

Mable said, "But if you can't stop Rephic, then every version of us across infinity will cease to exist! You have to try, at least."

"You're right," Bill sighed, standing up, "I should at least give myself a chance."

He came into the barrier and felt a shudder flow through his whole being.

Wizard said, "It's happening!"