Raid Battle

Mechanics
The Raid Battle event features sending out multiple parties, bolstered by equippable bonuses, against several stages of a massive boss.

Preparation
Up to five parties can be set up, and characters and mirrors cannot be shared among these parties. Power ups in the form of disaster traces can also be equipped onto the divine mirror for the event to grant various buffs.

Participation
A purification branch is needed to participate in the boss fight. These can be gotten from a daily login mission or the event shop (3 for 500 points each, 3 for 1,000 points each, and unlimited for 2,000 points each, daily). The player may hold only up to 10 at a time. Branches are consumed only upon finishing a boss entirely or retreating midway while keeping the rewards of earlier cleared stages.

Several levels of the boss can be chosen, and upon defeating the boss, the next few levels (1, 5, or 10 from the last cleared level) can then be chosen.

Combat
Unlike normal battles, there is no hard timer for the raid boss. It uses a soft timer, instead, with the raid boss growing stronger, increasing in Corruption Phases as time passes. Without bonuses from disaster traces, the boss will enter Phase 1 after 90 seconds, Phase 2 in 30 seconds after that, and the final Phase 3 in another 30 seconds.

Depending on level, the boss may also have up to 3 stages. Upon defeating each stage, the next party will be switched in to fight against the next stage of the boss. Upon being defeated, the next party will be sent out until no party alive remains, starting each battle with the boss at the HP lowered by the previous party and its Corruption Phase reset.

Event Bonus
Upon defeating the boss, the event bonus of the particpating parties are added together and divided by the number of stages the boss has. Points for each cleared are then granted according to that.

For example, a total event bonus of 300% will become 100% against a boss with 3 stages. However, the points gained for defeating such a boss will naturally also increase accordingly.

Recommendation
Due to the potential bonuses from disaster traces, Burn and Poison are especially effective. It is best to spread characters and mirrors capable of inflicting those status effects among the parties instead of concentrating them within a single one.

Disaster Traces
Disaster traces can be gathered either through drops from the boss, bought from the event shop, or achieved from missions. By equipping these traces onto the divine mirror, all parties will gain various bonuses against the event boss.

Each trace has a type, bonus, cost, and quality assigned to it. Equipping them occupies cost (which starts at 30) and grants their bonus, along with set bonuses when that includes enough traces of some specific type and quality.

Bonuses
Bonuses are dependent on the cost and quality of the disaster trace.

A 2-cost trace has twice the bonus of a 1-cost trace of the same quality, and the table below records the theorectical value for a 1-cost trace of that quality.

Set Bonuses
When a certain number of traces of any specific type has been equipped, a set bonus will be unlocked.

Fulfilling the set bonus requirement with traces of at least 4★ quality will unlock an even stronger bonus.

Event Points
Points are granted upon defeating the boss or clearing a level for the first time. These can be exchanged for rewards in the first event shop.

Sublimation
Disaster traces equipped on the mirror sum up to calculate a point value, adding 1 point for each ★ on equipped traces, along with point bonuses from set bonuses.

When the event ends, the divine mirror equipped with disaster traces can be sublimated once into sublimed fragrance. These can be exchanged for rewards in the second event shop at a 1:1 rate.

The below configuration, with every trace at 5★, is needed to achieve the maximum value of 360.