Harmonic Pact Event Details, Tips, And Rewards

Zenless Zone Zero features multiple fun activities and events that you can participate in to claim Polychromes and other rewards. Some of these events are time-consuming, while others can be finished within a single day.

One such event that was added alongside the version 1.5 update is Harmonic Pact, and it’s tied to the featured 5-star units of the patch, Astra Yao and Evelyn. If you are looking to participate in this event and claim all the rewards, here’s a guide that will make the task easier for you.

Harmonic Pact Eligibility

The Harmonic Pact event started on January 22, 2025, and will conclude on March 10, 2025. You have to reach Inter-Knot Level 15 and also complete the Soldier 11 Agent Story to participate in the event.

You can participate in the event without completing any other story quests. However, it is recommended you complete the other story quests, as there will be spoilers and references that will damage the overall experience if you directly jump into the event.

The story quest will be available even after the event is gone, but the other parts will be gone, and you’ll miss out on the Polychromes. As such, it is recommended you complete the event in time so that you can save the Polychromes for future characters.

Harmonic Pact Event Overview

The Harmonic Pact event is divided into two parts: Story and Special. The Story part includes the Astra-nomical Moment special episode featuring Astra and Evelyn. You’ll need to complete the story, as it is part of the progression for 100 percent event completion.

The Special part is divided into four subsections: Fugitive March, Trembling Temptation, Requiem, and Hollow Concerto. These are combat activities and your task is to defeat all the enemies. You can’t pick any other characters here except Astra and Evelyn, and all you have to do is pretty much defeat the enemies.

The whole purpose of the combat event is to give players an idea of how the featured 5-star units function.

In the combat stages, namely Fugitive March, Trembling Temptation, Requiem, and Hollow Concerto, if any agent is defeated, the stage immediately fails, and you have to restart once again.

Fugitive March

This is the first part of the event, and these are targets that you’ll have to meet are mandatory :

• Complete the stage
• No character should be defeated in this stage
• Stage must be completed with Agent HP above 30 percent.

You’ll receive a buff here called Perfect Pitch, where every time Astra’s attacks hit enemies, they will be marked and receive 50 percent bonus damage for 12 seconds. As such, all you need to do is Idyllic Cadenza State by activating her Special Attack. Once in the state, you can deal damage to enemies to mark them.

Once the enemies are marked, switch to Evelyn and finish off all the targets. Repeat the process until the stage is cleared.

Trembling Inspiration

This is the second part of the event, and these are the targets that you’ll have to meet:

• Complete the stage
• No character should be defeated in this stage
• Stage must be completed with Agent HP above 30 percent.

You’ll also receive two buffs here for both Astra and Evelyn. Astra’s Buff, Perfect Pitch, will be the same as the previous one, where hitting enemies will increase the damage they take. Evelyn’s buff called Stars and Strings in Harmony will ensure that when a Chain Attack or Ultimate is used on a marked enemy, Astra will perform an additional attack that will deal damage within a certain area.

This means that the additional attack will mark enemies once again, and Evelyn will continue dealing high damage to all targets. All you need to do here is spam Evelyn’s Chain Attacks as much as possible and use the Ultimate whenever it becomes available. This will allow you to clear the stage quickly.

The Snap Bangboo will also be available to try out in the event, as it has good synergy with Astra Yao and Evelyn.

Requiem

This is the third part of the event and these are the targets that you’ll have to meet:

• Complete the stage
• No character should be defeated in this stage
• Stage must be completed with Agent HP above 30 percent.

Both Astra and Evelyn will receive buffs here similar to the previous stages, and they function in the exact same way. However, Astra also receives a new buff called Heavy Metal where her additional attacks will generate 500 Decibels for the entire team.

This means you’ll be able to spam Evelyn’s Ultimate more often, which will help you to clear the stage faster. Apart from that, you clear this stage in the exact same way as the previous one.

Hollow Concerto

This is the final part of the event, and these are the targets that you’ll have to meet:

• Complete the stage
• No character should be defeated in this stage
• Stage must be completed with Agent HP above 30 percent.

The buffs for Astra and Evelyn are exactly the same as the ones in Requiem. There’s no special trick to defeat this stage, either, as all you’ll need to do is spam Evelyn’s attacks on targets marked by Astra and finish them off as fast as possible.

However, in this stage, there’s a points system, and you’ll need to hit 2,000 points to receive all the rewards. You can get it done in one try as long as you finish the stage within the time limit. If not, you can repeat it multiple times until the total points have been achieved.

Harmonic Pact Rewards

The rewards from the Harmonic Pact event include Polychromes, agent Ascension materials, and skill-leveling resources. The exact number of materials you need for this are as follows:

• Polychromes x260
• Specialized Ether Chip x9
• Senior Investigator Log x16
• Dennies x80000