When Luffy and Usopp are still arguing,
Jack stood silently, waiting for successful recruitment notification.
[System Notification: Crew Member "Usopp" Successfully Recruited]
Template Unlocked: Phastos – The Cosmic Technology Inventor
Memory Download Initiated…
Jack's body stiffened. His vision blurred for a moment as flashes of cosmic blueprints, weapons, and strange alien devices filled his mind. He saw the Domo ship, the one Eternals used to move at FTL and remembered how it cut through space using energy alone. He felt something he never felt before, smelled the heat of cosmic forges, and understood technologies far beyond this world.
When the memory surge stopped, he realized he was grinning like an idiot.
Luffy and Zoro had noticed Jack smiled madly.
"Oi, Jack. Why are you smiling like that?"
Everyone turned to look.
"Did something happen again?" Nami asked, folding her arms.
Jack exhaled slowly, the grin not leaving his face. "Yeah. I just… my power had returned."
Usopp blinked. "Power returned?"
"Captain," Jack said. "Let's stay here for a while maybe 3 to 4 days I wanted to upgrade our ship.."
There was silence for a second. Then...
"Another upgrade?" asked Luffy.
"Yes... can you leave all the upgrade thing with me?" asked Jack.
"Okay... shishishi," laughed Luffy, he also a bit excited and hope that Jack would add laser on his ship.
Time Skip 2 days.
While Jack are adding here and there suddenly he heard from Nami that the enemy had come to this place and Luffy and Zoro had settled them down.
They are again doing party and invite all the villagers, thanks to the system they have a lot of good food.
And the next day, the upgrade completed.
"Captain, do you know what special about our ship?" asked Jack.
"Can it shoot laser?" replied Luffy excitedly.
Hearing laser make usopp are also excited.
"Even better than that," replied Jack.
Luffy upon hearing this are begging Jack to show him.
"Ok captain," then he activated the mood.
Jack are doing something on his hand, sometimes it move left and right, sometimes it is up and down. The circles metal are moved on his hand, the crew become interested and just looked at his hand.
Then it happened.
A moment later, the Going Merry lifted, just a meter above the water.
"EEEEHHHHH?!" Usopp's jaw dropped so hard it nearly hit the pier.
"THE SHIP JUST FLEW!" Nami shouted, clutching her head.
Even Zoro's eyes widened. "What did you just do, Jack?"
Luffy's eyes sparkled like stars. "WOOOAH! THIS IS AMAZING! MERRY CAN FLY NOW! HAHAHA!"
Jack just grinned. "And that's not all. Get on board. I have something to show you."
Still stunned, the crew climbed aboard. Jack led them toward the interior. What used to be a cramped little room where the rudder controls were had now transformed into a sleek, modern cockpit with a polished helm and glowing panels.
Usopp rubbed his eyes. "I… I must be dreaming. This looks like a warship control room!"
"It's not a warship," Jack corrected with a smirk, "it's better. This is Merry's new navigation hub. I've added radar so we can track incoming ships and storms before they even appear on the horizon."
Nami's jaw slackened as she stared at the glowing radar screen. "You can… track weather patterns with this?"
"Yes," Jack said proudly. "And we can steer with this rudder system. It's much more responsive than a wooden wheel. The sails are still functional, but we now have an engine powered by a cosmic arc reactor."
"Arc what?" Zoro asked.
"Basically," Jack explained, "it takes any energy, even enemy attacks and converts it into power for the ship. If a cannonball hits us, we don't lose durability, we gain free fuel."
"That's… insane," Usopp muttered.
But Jack wasn't done. "Follow me."
He opened a door and led them deeper inside the ship. The crew gasped as they stepped into a hallway that clearly should not have been able to exist in a ship this small.
"Jack…" Nami said slowly, "how big is the inside now?"
"Thirty rooms," Jack replied casually. "I expanded the interior using spatial compression technology."
"Spatial what?!" Usopp screeched.
Jack ignored him and began pointing at doors as they walked. "This is the radar room. That one is the training hall, complete with reinforced walls so Zoro won't slice the ship in half. That one is a gravity chamber. You can train at up to ten times normal gravity."
"Ten times?!" Zoro smirked. "Finally, some real training."
"There's a bathhouse down the hall, a small indoor garden, and even an aquarium where we can keep fresh fish alive."
Luffy was bouncing like a hyperactive child. "WE HAVE A GRAVITY ROOM! AND AN AQUARIUM! THIS IS THE BEST SHIP EVER!"
But Jack saved the most shocking for last.
"Oh, and one more thing," Jack said, grinning mischievously. "If any giant or anyone taller than 2 meters steps within ten meters of Merry, they'll automatically shrink to normal human size."
Everyone turned to stare at him.
"Wait… WHAT?!" Usopp said.
Jack shrugged. "Safety measure. From information I received they are Giant race living in Grandline and Luffy won't you invite Giant to become part of the crew?"
Luffy grinned, "Shishishi..."
There was a long pause before Luffy's face split into the widest grin imaginable.
"JACK…" he said, his voice trembling with excitement. "…YOU'RE AWESOME!!!"
The captain jumped into the air, landing on Jack's shoulders and laughing. "WE'RE GONNA BE THE BEST PIRATES EVER!"
Everyone couldn't help but smile even Zoro, who pretended to look unimpressed, was clearly excited about the gravity room.
For the first time since coming to this world, Jack felt like he was shaping the Straw Hats' in ways to become the best pirate ever.
p/s: Can phastos cosmic technology turn them into super soldier like captain america? If I remember Banner is not expert in technology so I don't think it is possible.