Hello.

The theme of this post is finger exercises, with a focus on gaming mechanics where timing plays an important role.

In MapleStory, boss fights are a prime example, and I often find myself impressed by players who clear the particularly demanding higher-tier bosses every week.

Kai, recently introduced as a boss in Challenger World, uses a parrying system that requires well-timed inputs to counter his attacks, but the generous timing windows on Normal difficulty keep the challenge manageable, making him a well-received addition to this Challenger World.

The rewards make him even more appealing: on Normal difficulty, he offers 300 million mesos, a random amount of Sol Erda Fragments ranging from 20 to 100, a chance at a rare Pitched Boss Box, and generous amounts of Challenger Points and coins relative to his difficulty. Together, these rewards match or exceed what soloing the bosses below Black Mage offered before the Intense Power Crystal adjustments.

Since the fight is not particularly difficult, I have put together this guide to his attack patterns in the hope that anyone who meets the stat requirements but has been putting it off will give it a try.

The Basics

1) You can use 2 special skills while fighting Kai

The Chrono Gauge at the top of the UI fills at regular intervals and decreases when Kai hits you.

Chrono Break, activated with the TAB key, consumes the Chrono Gauge shown above and is used only during Time Distortion patterns, slowing them down while active.

Time Distortion patterns are extremely fast by default, and Chrono Break must be active to replenish your available parries, so surviving is nearly impossible if it runs out during Time Distortion. Preserving your gauge by avoiding normal attacks as much as possible is therefore essential.

Chrono Step, activated with the Harvest key, is a parrying skill that blocks Kai's attacks. Its uses are limited during normal mode, so try to dodge without relying on it whenever possible; during Time Distortion mode, activating Chrono Break as described above allows you to parry repeatedly.

By default, this skill also makes you dash, but holding the down arrow key while using it lets you activate it in place, so choose whichever method feels more comfortable.

A successful parry displays a blue effect on your character.

2) The Time Distortion System

Upon entering, you have 50 seconds during which Kai uses his sword techniques and normal attack patterns. Getting hit deals heavy damage or knocks you back a long distance while also reducing your gauge, so avoid these attacks as much as possible.

When the countdown ends, Time Distortion begins and introduces special attack patterns. In both Phase 1 and Phase 2, 2 of the 3 possible patterns appear during this period.

Activate Chrono Break as soon as Time Distortion begins. It is essential because it slows down the patterns and replenishes your available parries whenever you parry an attack.

During Time Distortion, a score capped at 10,000 appears at the top of the screen. It rises quickly when you dodge attacks, parry them, or avoid damage with invincibility skills, and decreases when you get hit or die.

If your score is 10,000 when Time Distortion ends, you receive the effect shown above, allowing you to use your burst skills sooner while Kai is staggered. Even if you finish below 10,000, your cooldowns are still reduced in proportion to your score, which is why classes focused on sustained damage are said to have a relatively harder time fighting Kai.

This cycle of 50 seconds and 20 seconds repeats throughout the fight, though the latter period is somewhat longer in practice due to Chrono Break.

3) Shared Patterns in Normal Mode

The lines that appear throughout the map are not lethal, so getting hit by them is not a concern.

The pillars permanently positioned at the far left and right edges of the map are lethal. You are unlikely to walk into them yourself given their placement, but watch out for Kai's knockback attacks, which can push you into a pillar and cause repeated hits that kill you.

If you move beyond a certain distance from Kai, he teleports to your character's location and attacks twice. This happens in both Phases 1 and 2, and the second hit deals heavy damage and knocks you back a long distance, so avoid it whenever possible.

Staying close to Kai makes most of his patterns easier to dodge anyway, and moving just far enough away to avoid his sword energy does not trigger this attack. After a few attempts, you should get a feel for the distance.

He also uses this skill when you up-jump, even if you have not moved far away, so avoiding up-jumps generally makes the fight easier. You can use this behavior to your advantage if Kai ends up in a corner unintentionally: position yourself in the center of the map and use Blink in midair to lure him beneath your character.

Phase 1: Normal Patterns

After you enter, Kai ties back his hair and jumps over to land beside your character, signaling the start of the fight. Use your burst skills immediately, then keep attacking while avoiding the patterns below as much as possible. The attack indicators give you enough warning to react even on your first attempt, and dodging becomes easier as you grow familiar with their ranges.

1) Dash Attack

After the attack area is marked as shown above, Kai dashes forward and attacks. Check which direction he is facing and move behind him for an easy dodge.

At the end of the dash, he sends a clone to attack once more to the left or right. This attack's range is also marked, so dodge it in the same way.

2) Two Stationary Attacks

Kai attacks twice without moving. To dodge, move in the opposite direction from the way he faces as he prepares to attack.

3) Sword Energy Release

When the message shown above appears on screen, Kai performs 2 wide-range attacks.

Move away from Kai as soon as you see the message to avoid getting hit, then close in again and continue attacking until this pattern returns.

4) Sword-Spinning Attack That Requires a Parry

After his sword flashes, Kai tosses it into the air to spin, catches it, and gathers energy before attacking, sending sword energy out to both sides. When the sword flashes, parry toward Kai to close the gap and avoid the attack.

Phase 1: Time Distortion Patterns

Remember to press TAB to activate Chrono Break as soon as the special patterns begin, then time your Harvest key inputs to parry Kai's green attacks. Parrying is not your only option here: dodging normally or using invincibility skills also works, though the parry timing window is quite generous.

Each Time Distortion features 2 of the 3 possible patterns.

You can still attack Kai during Time Distortion, but unless you are barely meeting the minimum requirements to clear the fight, avoiding his attacks should take priority.

1) 4/4/4/1 Attack Sequence

Kai rises into the air, then rapidly dashes toward you to attack. He performs 3 sets of 4 consecutive attacks, pauses briefly, and launches 1 final attack.

Many consider this the hardest pattern on Normal difficulty, but it becomes more manageable once you learn to time your parries to the moment the circular effects converge in the center. Using an invincibility skill here is another option.

2) Large Lasers on Both Sides: 7 Attacks

Large lasers sweep across the map on the left and right sides of the screen, attacking a total of 7 times. Watch their movement and parry each attack in succession.

3) Laser Bombardment from Above: 5 Attacks

Kai sends sword energy upward, then attacks rain down after the warning shown above. When that effect appears, move into a nearby gap between the pillars, indicated by the arrows, to avoid getting hit.

After dodging at the position shown above (1st attack), move to the spot immediately to your left where the previous attack landed (2nd attack), then move right to where the next attack landed (3rd attack). Stay still for the next one (4th attack), then time your parry to the final descending attack (5th attack) to finish the sequence.

These patterns repeat until Kai reaches 50% HP, at which point all patterns stop and Phase 2 begins immediately. Depending on the situation, it may be worth saving your burst skills.

Phase 2: Normal Patterns

These are enhanced versions of the Phase 1 attacks, so the basic strategies for handling them remain the same.

1) Enhanced Dash Attack

Kai still dashes forward to attack, but afterward he sends clones in both directions from where he stops, rather than just one. Once the first attack ends, move close to Kai in the center to avoid the follow-up.

2) Two Stationary Attacks: Identical to Phase 1

3) Enhanced Sword Energy Release

The same warning message as in Phase 1 appears, and you still need to move away to dodge. The second attack, however, now also launches massive waves of sword energy to both sides of Kai. Once he plants his sword, parry before the energy launches to avoid it.

4) Enhanced Sword-Spinning Attack

You can parry this just as in Phase 1, but it releases sword energy 2 additional times, for a total of 3. As before, parry toward Kai to close the gap and avoid the attack.

Phase 2: Time Distortion Patterns

This follows the same structure as Phase 1: activate Chrono Time as soon as it begins, then get through 2 of the 3 patterns to complete the sequence.

1) Large Lasers on Both Sides: 10 + 5 Attacks

This works the same way as the Phase 1 pattern, but with faster lasers and more attacks. After rotating 10 times, the lasers reverse direction for another 5 rotations at a faster speed, so pay a little extra attention while learning the pattern.

2) Dodging Lucid-Style Lasers

Dodge these as you would Lucid's lasers: move through the gaps whenever possible, and parry when an attack becomes difficult to avoid.

3) Map-Wide Sweeping Attack

This pattern begins at either the far left or far right of the map, with green effects appearing in sequence from that edge to the opposite side, as shown above. Run toward the starting side as soon as you see them.

Blue effects then appear in sequence at the same locations as the green effects. Keep moving while timing your parries to block them as they appear; the timing window is quite generous.

The seasonal boss system looks likely to continue in future Challenger Worlds, and the fact that Kai is specifically described as this season's boss suggests that the boss will change each time. I hope future bosses maintain this approachable level of difficulty and continue to receive a positive response.

Thank you for reading.