Rovlen is stationed in the Bilbrin Forest area of West Luterra. You can find the nightmare plant in the south part of the map.

Rovlen is a monstrous carnivorous plant that came into existence after the Moon fragments have discharged their chaotic energy across the land, following the Chain War, which has resulted in the Moon being blasted into pieces.

Rovlen has over 1.5 million HP, which needs to be depleted 15x times the first time you fight him. A lot of damage is needed to kill this boss, so here are a few tips on how to actually beat him:

    Rovlen's attacks both physical and ranged are poisonous, so bring some poison healing or poison resistant items to the fight.

    Once you deplete his HP meter the first time, he will create a shield surrounding and healing him. You need to cut all the tentacles outside of the shield to be able to destroy the shield and stop him from healing.

    The best type of strategy against Rovlen is Dash attacks, which allow you to make quick powerful blows, and then retreat once you need to heal up. Repeat this until Rovlen is finally dead.

Rovlen’s attacks are straightforward to anticipate, and the classes in Lost Ark that focus on range should find them especially easy to avoid. Because Rovlen is stationary, it almost eliminates players' need to adjust and move constantly. The fight is challenging because this boss has quite the large health bar and can regain health if players aren’t always on the offensive.