Alien invasion? Luckily, I'm Superman.

After briefly introducing himself, Su Mo sized up the Justice League member in front of him.

Green Arrow had messy hair with a touch of yellow dye, wore a green eye patch, had a goatee on his chin, and was dressed in a green combat uniform with a row of quivers hanging from his waist.

His abilities are somewhat similar to Batman's, both relying on equipment and fighting skills, but he doesn't have Batman's skeptical personality and sense of loneliness.

Batman has always kept Green Arrow as a backup plan for the Justice League in case he is in danger, but to be honest, Green Arrow has little presence and is completely overshadowed by Batman's darkness.

"Damian, what brings you here?" Green Arrow looked at Damian, his tone tinged with helplessness and a headache. "Your father asked me to take care of you. Now that you've entered this dangerous place, how am I supposed to explain this to your father?"

Damian sneered, crossed his arms, and slightly raised his chin: "Who cares! Robin's job is to disobey Batman's orders!"

"Hey, Robin," Beast Boy poked his head out from behind and said with a grin, "I think Green Arrow is right, you should listen to your father, hehe."

"Shut up, you beastly boy!" Damian snapped.

The Beast Boy shrank his neck and made a face.

Seeing this, Green Arrow couldn't help but laugh and say to Su Mo, "Haha, what a loving team, isn't it?"

"Who says otherwise?" Su Mo shrugged.

Next, Su Mo and Green Arrow walked at the front of the group, following the marks Green Arrow had made along the way, and passed through a corridor.

"Something's not right." Green Arrow suddenly stopped, frowning as he looked at the arrow stuck in the wall. "There's a strong magnetic field here; my arrow has been deflected."

The group looked around and found themselves in a long corridor. The floor and walls were covered with black and white checkered tiles, and a huge demon statue hung overhead, bound by rusty chains. Its face was ferocious, its head was bowed, and its empty eye sockets seemed to be staring at everyone who passed by.

"Are we going in circles?" Aquaman gripped his trident, scanning his surroundings warily.

"No, we can determine the direction by the arrow's movement," Green Arrow replied, turning to look at the spot where the arrow had been planted, only to find it gone.

His expression changed slightly.

"Look, Cupid!" a familiar female voice came from the corner. "These arrows must be yours, right? I've been collecting them in the maze."

Harley Quinn emerged from the shadows carrying a large handful of arrows.

The arrows swayed in her arms, a few protruding from her chest with their arrowheads pointing upwards. She tilted her head, blinked, and looked at the green arrows with a grin.

Green Arrow covered his face, his tone full of helplessness: "You must be kidding me."

"Did Amanda give you the order?" Green Arrow lowered his hand and asked seriously.

"That's right!" Harley nodded, her ponytail swaying behind her head. "And we found the center of the maze a long time ago, we just couldn't solve the puzzle."

She beckoned with her index finger, her gaze darting back and forth between Damian and Green Arrow.

"I agree!" Damian shouted before Green Arrow could refuse.

"Okay, little Robin~" Harley smiled sweetly at Damian, then turned to Su Mo, tilting her head and asking, "And who is this?"

Su Mo gave another brief self-introduction.

"Haha, it's nice to meet you, sweetheart," Harley said warmly, with a bright smile.

Su Mo responded with a smile.

Although Harley is a bit crazy, she is still quite cute. She has blue and red eyeshadow on her face, blonde hair cascading over her shoulders, and wears a tight-fitting outfit with leather pants on her right leg and black fishnet stockings on her left. She exudes a chaotic yet charming aura.

"Alright, let's go." Green Arrow sighed helplessly and followed Harley and Killer Croc, who had been silently following behind.

The group walked through several winding passages and soon arrived at their destination.

Damian crouched in front of a huge metal door, looking at the message left by the riddle teller, and quickly solved the riddle. In less than half a minute, the heavy door slowly slid to the sides.

Behind the door was a spacious hall, in the center of which stood a huge robot.

The robot has curved demon horns on its head, wields a huge black spiked scythe, has a matte metallic finish all over its body, is adorned with green crystals at its joints, and has the shape of a goat's hoof on its feet.

Standing over twenty meters tall, it is exactly the same as the demon statue that hung overhead in the corridor before, exuding a dangerous aura and creating a strong sense of oppression.

"You damned bunch!" The Riddler's voice boomed from the robot's loudspeakers, echoing through the empty hall. "Cheating! Cheating when you can't find the way! Cheating when you can't solve the puzzle!"

Harley Quinn was the first to grab the sledgehammer and charge at the robot's legs, yelling, "I've always wanted to do this! To be a bullfighter clown!"

Green Arrow nocked an arrow, drew the bowstring taut, and shot it, striking the robot squarely in the head. The arrowhead embedded itself in the crack of the green crystal.

Su Mo stood there, watching the Titans, Green Arrow, Harley Quinn, and Killer Croc rush towards the robot, and couldn't help but complain, "Isn't it a bit unfair that we have such a star-studded lineup fighting the Riddler?"

He silently mourned for the riddle solver for three seconds.

Sure enough, the robot was quickly subdued. The raven's purple magical energy wrapped around the robot's ankle, tripping it to the ground.

Xinghuo fired green energy bullets with both hands, precisely severing the robot's limb joints.

Damian charged up the robot's arm, smashed the observation window on its head with a single blow, dragged Edward the Riddler out, and slammed him to the ground.

"Where is my father?" Damian crouched down, grabbed the riddle-maker by the neck, and demanded angrily, "What did you do to him?"

The riddle-maker's eyes were vacant, his lips trembling as he muttered to himself, "It's N, it's all because of N. You bunch of idiots, you can't imagine the calamity that will befall you, you're all dead..."

Su Mo shook his head as he looked at the Riddler, thinking to himself: "Tsk tsk tsk, is this the charm of Batman? Edward is still reminding us that N metal is the most important clue, hoping we can save Batman so he can play with him."

Green Arrow picked up a scattered card from the ground; the card had the demonic image of the demonic robot printed on it.

Su Mo straightened up, her brows furrowing slightly, and urged, "Alright, let's hurry up and go."

He could feel a faint, unseen gaze, as if someone was watching their backs from the shadows, a feeling that made him very uncomfortable.

Thinking of the Batman Who Laughs's flawless strategies in the comics, Su Mo felt a chill run down his spine. He wasn't sure if the Batman Who Laughs had some purpose in keeping him alive.

The group pushed open the door at the end of the hall.

Outside the door was a world covered in ice and snow. The cold wind, carrying snowflakes, rushed towards us. The ground was covered with a thick layer of ice, and the outlines of distant buildings were faintly visible in the wind and snow.

A loud shout came from not far away: "Robin!"

"Father?" Damian turned around abruptly, looking in the direction of the voice, his tone hesitant.

"No, he is Nightwing," Su Mo said calmly.

He had already seen the figure running towards them—Nightwing Dick Grayson, in a black bodysuit with silver shoulder pads across his chest.

Behind him, a huge ice giant was relentlessly pursuing him with heavy strides, each step leaving a deep footprint on the ice.