Hard1500+4 Players Max

Boss Rush

A sequential boss fighting mode accessed via Rush Keys (dropped by all enemies in-game). Players fight wave after wave of bosses with increasing difficulty. Earn Rush Coins to purchase upgrades from the Boss Rush Shop, including the Sun Armor (+115% Defense, +87% Damage, +25% Damage Reduction when fully upgraded, costs 250 Rush Coins). Selectable difficulty: Easy, Medium, Hard, Extreme. The Boss Rush portal is located on Sailor Island.

Overview

Level Required

1500+

Difficulty

Hard

Max Players

Estimated Time

10-15 minutes per run

Sea Region

Early Islands

Last Updated

2026-03-30

Boss

A
Jinwoo
Easy difficulty
A
Alucard
Medium difficulty
A
Yuji
Easy difficulty

Rewards

•
Rush Coins
Currency for Boss Rush Shop
•
Sun Armor
250 Rush Coins — +115% DEF, +87% DMG, +25% DMG Reduction
•
XP and Cash
Scaling with difficulty

Requirements

1
Minimum level: 1500
2
Complete the Dungeon Master NPC quest chain on Dungeon Island
3
Collect all 6 Ancient Puzzle Pieces from islands across the map
4
Defeat 25 bosses (open-world and mini-bosses both count)
5
A Dungeon Key or Rush Key (depending on the dungeon type)

Strategy Guide

Boss Rush uses Rush Keys, which drop from all enemies across the game. Stock up on Rush Keys before entering — each run consumes one key on entry. The portal is on Sailor Island.

Difficulty Modifiers

•
Easy
Damage Reduction reduced by 35% — more forgiving for learning boss patterns.
•
Medium
DR reduced 70%, Lifesteal reduced 50% — solid middle ground for Rush Coin farming.
•
Hard/Extreme
DR fully disabled, Lifesteal disabled, iFrames limited to 1.5 seconds only. Requires top-tier gear.

Tips

• Save Rush Coins for the Sun Armor (+115% Defense, +87% Damage, +25% Damage Reduction when fully upgraded for 250 Rush Coins). This is one of the best accessories for overall survivability and damage, making it worth grinding Boss Rush for even at endgame.

Recommended Builds

Builds that perform well in Boss Rush:

•
Kitsune + Eminence Clan Farming Build (Massive Update Meta)
•
SwordBlessed + Gilgamesh PvP Build
•
Kitsune + Monarch Clan Farming Build

Patch History

2x Luck + QoL Update

March 30, 2026

•
2x Luck Event active — all accessory, title, boss rush, and dungeon drop rates doubled. Does NOT apply to trait or race rolling. Stacks with other luck buffs.

Hotfixes March 27

March 27, 2026

•
Fixed Infinite Tower upgrades — now also apply in Dungeons, Boss Rush, and Infinite Tower itself

2x Luck Event

March 20, 2026

•
2x Luck Event — doubled drop rates for accessories, titles, boss rush, and dungeon drops. Does NOT apply to trait/race rolling.

Alter Update

March 16, 2026

•
Slight increase to Boss Rush coin rewards.

Boss Rush Update

January 15, 2026

•
Boss Rush event mode introduced — a wave-based game mode where players fight a sequence of bosses back-to-back for escalating rewards.
•
Boss Rush portal added to Sailor Island — requires a Rush Key to enter (obtainable from NPCs or the timed merchant).
•
Boss Rush rewards include exclusive Boss Rush Coins redeemable for rare accessories and cosmetics.
•
Escanor added as the final Boss Rush boss — the most powerful encounter in the mode.
•
Boss Rush difficulty scales with the number of players in the instance.
•
Bug fixes for boss spawn timers in the new Boss Rush mode.