Obsidian: Welcome to the latest installment of Transformers: Overdrive!

Shadow: This chapter's just for the Key Challenge.

Sonic: Next time'll...

Silver: Let's talk about next time after the chapter!

The Big Challenge

The New Ark appeared over Station Square. Everyone beamed down, and the movie Autobots instinctively transformed. "There's no need for that, guys," Sonic told them, "everyone knows about Transformers." Everyone then turned their attention to the big (and I mean BIG) tower in the middle of the ocean. "What is that!?" Tails said. "That," Vector Prime replied, "is where the Giant Planet Key resides."

"Let's go already!" Light said, "The sooner we get the Keys, the sooner we can stop Darkstone!" "Sorry, corporal," Hassleberry said, "but you should stay in the barracks." "He's right," Obsidian added, "your wounds aren't fully healed yet, so fighting will just make them worse." Light decided to go back onto the ship, because he knew that everyone agreed with Obsidian. Obsidian, Jaden, Sonic, Bumblebee, Gregory, and Prime then entered the tower via a panel that appeared next to them.

(Inside the tower)

Everyone appeared in a large room. "Everyone should keep an eye out for the Key Guardian," Obsidian said, "You never know what he could be." "Aye, good point," a voice said, coming from above them. They looked up to see a truly massive Transformer, about the size of a standard skyscraper. "Are you the Key Guardian?" Sonic asked. "Indeed I am," the Transformer said, "name's Metroplex." Everyone just stood there, not really moving. "My challenge is a simple one," Metroplex continued, "climb to the top of the tower in 3 cycles." "What's a cycle?" Gregory asked. "Oh, about one of your hours, lad," Metroplex replied.

They noticed a staircase appearing next to them, and started to climb it. Bumblebee and Prime decided to stay behind, since they were too big for the stairs, anyway.

"So," Gregory said, "what's with these stairs? I thought we'd end up in another maze." "Each Guardian has their own challenge," Obsidian said, "Each one suits the each Key best. A maze for the Earth Planet Key, a race for the Speed Planet Key, and a climbing challenge for the Giant Planet Key." Sonic decided to walk, because the stairs were rather steep.

"I wonder if this is only stairs," Jaden said. "If it were," Obsidian replied, "we wouldn't have 3 hours to get to the top."

They came to a room about a third of the way up. Inside was a multitude of puzzles. There were four levers, a block puzzle, and a huge slider. "Look for clues as to how to solve these puzzles," Obsidian said. Sonic looked at the slider and started to move the tiles, hoping to figure out what the picture is. Gregory started looking at the block puzzle, hoping to find all the switches. Jaden pulled the lever farthest to the right without thinking first, and a bunch of snakes fell into the room. "JADEN YUKI!!!!" everyone else shouted. Obsidian turned the snakes into slinkies, and went over to one of the other levers.

Sonic finally figured out the picture on the slider panels, the Omega Lock symbol, which Vector Prime showed them on the way to Jaden's dimension. As he put the last panel into its proper place, another panel appeared in the empty space left after the puzzle was solved, after which the whole thing lit up.

Gregory found the switch, and started moving the first block to it. He occasionally had to smash another block with his staff. Once the block was on the switch, a panel next to the slider puzzle lit up.

Obsidian pondered the lever puzzle. It's not the far right, he thought, that leaves three, but which one? He looked at the symbols above the levers. The middle left had a strange, clawed footprint over it, the far left had a rising sun, the one Jaden pulled had streaks, and the last one had a gear. Wait, Obsidian thought, those are the symbols on the Cyber Planet Keys. The correct lever should have the Giant symbol over it. It must be… "This one," he said, pulling the middle right lever. The last panel lit up, and the door leading farther upwards opened. Everyone continued on their way.

"I HATE SLIDER PUZZLES!!!" Sonic shouted. "I here ya," Jaden replied. The group continued upwards, seeing another door about a third of the way from the top.

They entered it, and saw a bunch of drones, with a counter that read "100". Sonic started gathering energy for a Light-Speed Attack, when Gregory inhaled and let loose a large jet of flame from his mouth at the drones, taking out 20 of them, which the counter confirmed. (80)

Obsidian rushed into a large group of them and swung Lightbringer in a large circle, taking out a bunch of them. (65)

Jaden let loose a huge blast of fire at the group of drones, taking out a lot of them. (50)

Sonic had all the energy he needed, and launched his Light-Speed Attack, taking out all of the remaining drones. (1)

"Wait," Sonic said, "why does the counter still say that there's an enemy left when we just KOed all of 'em?" "I don't know," Obsidian replied. The ground rumbled. "I think I'm getting an idea about that," Jaden said, as a large robotic dragon appeared. It attacked the group with fire breath. Everyone dodged the attack at the last second.

Obsidian tried to turn the dragon into something easier to defeat, like a Goomba, but nothing happened. Sonic sent fireballs at it, but it dodged them. Gregory started whacking it with his staff, inflicting actual damage.

Obsidian used his heart-sense on the dragon, which revealed that it was, in fact, a machine. He drew Lightbringer and leapt up to attack, beheading the robot. It fell to the ground, nonfunctional. The door opened, and the group continued onward.

The next door had a timer above it. It read "1:01:59". "I guess that's our remaining time," Sonic said. "Aye, lad, you guessed it," Metroplex said. They were just above his head now. Jaden noticed that these stairs weren't as steep. "Hey, guys," he said, "I think we can run the rest of the way!" They start running up to the top.

They make it with "00:01:05" on the clock. Obsidian grabs the Key. "Okay," Greg said, "let's go!" Obsidian warps them back to the gang.

"Good to see you're still alive, general," Hassleberry said when they appeared. Prime and Bumblebee were standing next to him. "At ease, soldier," Jaden said.

Essence appeared. Everyone readied weapons. "Don't worry," she said, "I'm on your side." "How can we trust you?" Chazz asked. "Let me put it this way," Essence replied, "if I came here to fight you, I wouldn't appear in front of you, now, would I?" Everyone replied with various ways of saying "no".

"Just let me explain," Essence continued, "Darkstone's to busy looking for his precious Planet X Key to bother you, but the Decepticons are at Duel Academy, waiting for you to arrive with the Cyber Planet Keys. The Apocalypse Forces are also lying in wait on Academy Island, for the Spirit Keys." "Thanks for the information," Obsidian said, "we'll be sure to put it to good use." "Oh, and before I forget," Essence added, "I'd love to see you in your human form." She then vanished.

"Where are we going next?" Sonic asked. "Mobius," Obsidian replied. "You mean," Manic said, "our home world?" Everyone boarded the New Ark, which disappeared again.

Obsidian: Uh...

Ultimate: (Still barfing)

Sonic: He really hates romance.

Silver: Next time: Battle of Mobius!

All: See ya then!