Here's ways to find and defeat Wili-Wili in Lost Ark
There is a level-29 World Boss in Lost Ark named Wili-Wili. Wili-Wili is on a timer and respawns every 30 minutes after being defeated. He is located in Sunbright in East Luterra. Unless you kill him before his reset, he will return to full health.

The Wili-Wili boss usually spawns on the continent of Luterra East. It spawns in the northern part of Sun Bright Hill, located on East Luterra. Unfortunately, you’ll need to progress through the game’s story until you’ve unlocked both East Luterra and Sunbright Hill before you can take on this boss.

Even if a boss is not available right when you're in the area you might want to check the area chat as the boss could be available in an other channel.

To change channels, simply click on the CH in the top right corner of the screen and select the channel you want to join.

Wili-Wili cannot be defeated easily and has 1,419,432 hit points and 23 life bars. World Bosses are generally best taken on in a group. Wili-Wili's attacks are relatively easy to dodge because their build-up is so long.

First of all, it is strongly recommended not to face the boss alone. This creature is a world boss. As such, it is not recommended for solo encounters. Instead, organize a group of friends or random players, then challenge this pumpkin monstrosity.

Rewards for beating Wili-Wili

You will receive The Adventurer of East Luttera achievement and Adventurer's Tome reward will be unlocked
A Magick Observer gear piece
A Fragmented Spirit Necklace
An epic chest which has:
x1 Epic Accessory
x2 Uncommon combat Engraving Recipes
Stone of Endurance
Secret Map
Eternity Essence
Wili-Wili Card

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