Boss Rush mode is available during the endgame content of Lost Ark after you have reached Level 50. During this mode, you are pitted against bosses that you need to defeat within a time limit, either by yourself or with a maximum of four players.
In order to unlock Boss Rush mode, you will need to hit the endgame content at Level 50, have an Item Level of 802 for Hall of Science, and have an Item Level of 1302 for Hall of the Sun. You will also have to complete the Adventure Quest Boss Rush quest beforehand.
After completing all three of these prerequisites, you’ll be able to use a Boss Rush ticket to enter a Boss Rush in any major city by going to the Boss Rush Statue. In order to find these tickets, you will need to unlock and battle in Chaos Dungeons and Guardian Raids.
You’ll be rewarded with plenty of rewards for completing these dungeons, so it’s in your best interest to take advantage of them with as many players as possible.
For more Lost Ark, check out All monster locations in Arthetine in Lost Ark on Pro Game Guides.
