Tir: It can be obtained through the completion of Tortoyk (Adventurer's Tome). It can also be acquired by obtaining An RNG drop from Lost Ark Gold Protector Peros leader in Tortoyk's Heart Dungeon.
We'll See You Again
This is a fantastic card set for PvE as well as GvG play. It works well with Berserkers who use the Mayhem engraving.
This is what's Boss Rush in Lost Ark
Just like the title implies, Boss Rush is a challenging mode of play where you have to beat bosses who appear one after another on a stage within a set time limit. You can play Boss Rush in Lost Ark either on your own or with groups of up to 4 players max.
After you've started Boss Rush mode and leave the battle waiting area it is impossible to change the skills, Battle Items or Equipment, so make sure to fully prepare prior to starting. Potions are also not available however, if a group member passes away, you are able to revive them after waiting for just a few minutes.
After you've finished a stage, before moving to the next stage, you can interrupt your running by using the UI on Lost ark gold buy the top left-hand corner of your screen.