### Chapter 20: Titan Slayer Part 2
Sun Han wiped the blood from his mouth, his breath ragged but steady. The towering fire titan lay lifeless before him, its fiery heart extinguished by his precise strike. As he stood there, catching his breath, a system prompt appeared before his eyes:
**"You are now eligible to rank up to Tier 1. Rank-up mission: Kill one Tier 1 organism and five Tier 0 level 5 organisms."**
The message brought a new sense of urgency and determination. He was close to reaching the next tier of power, but the mission would not be easy. The requirement to kill a Tier 1 organism loomed large in his mind, but he knew he had to take it one step at a time.
A sudden scream pierced the air, yanking Sun Han from his thoughts. He whipped around to locate the source and saw Mia locked in a fierce battle with a mutated titan. This new titan was as large as the fire titan but with a chilling difference—it wielded weapons made of ice, conjuring them from thin air.
"Mia!" Sun Han shouted, fear and urgency in his voice. He sprinted towards her, his mind racing to formulate a plan.
As he approached, he saw Mia narrowly dodging an ice spear that the titan had hurled at her. She moved with incredible agility, but the titan's relentless assault was pushing her to the brink. Without hesitation, Sun Han combined his katana slash with the hell flame, his blade igniting with intense, otherworldly fire. He aimed for the titan's left ankle, slashing clean through it with a powerful, precise strike.
The titan let out a deafening roar as it crashed to the ground, its massive body incapacitated. Sun Han wasted no time. He dashed forward, leaping onto the titan's chest and driving his katana into its heart with all his strength. The blade pierced the icy flesh, and the titan's heart stopped beating. The monstrous body convulsed once before lying still.
Mia collapsed to her knees, panting heavily. "Thanks, Sun Han," she said between breaths. "That thing almost had me."
"We're in this together," Sun Han replied, helping her to her feet. "We need to keep moving."
With Mia safe for the moment, Sun Han turned his attention to the remaining giants. His mind was focused on the rank-up mission. He needed to kill five more level 5 titans and then find a Tier 1 organism. The thought was daunting, but the new regeneration skill bolstered his confidence.
Sun Han began to move through the battlefield with lethal efficiency. Each encounter with a titan was swift and decisive. His katana, combined with the hell flame, became a deadly weapon that cut through the giants with precision. He targeted the red, beating hearts of each titan, knowing that was the key to their downfall.
One by one, the titans fell. He killed a particularly tough level 5 titan with armored skin by targeting its joints before delivering the final blow to its heart. The next was a nimble, agile titan that tried to outmaneuver him, but his hell flame and katana combination proved too much for it.
Sun Han's movements were a blur of fire and steel. He dispatched another level 5 titan that had razor-sharp claws, dodging its attacks and striking its heart with unerring accuracy. He felled a fourth titan that could emit paralyzing roars, using his hell flame to silence it permanently.
As he fought, a system prompt appeared briefly, showing his kill count. Four down, one more to go.
He spotted his final target: a colossal titan that was wreaking havoc among the survivors. It was a level 5 titan, its body bristling with spikes. Sun Han approached it cautiously, assessing its movements. He waited for an opening and then struck with all his might, his katana slicing through its spiked defenses and into its heart.
The titan let out a final, anguished roar before collapsing. Sun Han stood over its body, breathing heavily. The system prompt appeared again:
**"Mission update: 5/5 Tier 0 level 5 organisms killed."**
Sun Han knew the hardest part was yet to come. He needed to find and kill a Tier 1 organism. He scanned the battlefield, looking for any sign of such a creature. His eyes caught movement at the edge of the field—something larger, more formidable than the other titans he had faced.
With a determined look, Sun Han set off towards the new threat. Mia called out to him, but he waved her off, signaling that he would handle this alone. She nodded, understanding the gravity of his mission.