Hiisi Island has become one of the most intriguing destinations in Genshin Impact since its release in Version 5.5 "Luna I" in early 2025. This mystical location in Nod-Krai has captivated players with its ancient forests, rich lore, and challenging quests. For travelers looking to fully explore this moon-goddess worshipping realm, this comprehensive guide covers everything you need to know about Genshin Impact's Hiisi Island.

The History and Lore of Hiisi Island

Hiisi Island stands as a testament to ancient worship and mysterious technology. According to local resident Helka, the island contains relics with designs similar to Secret Source technology, though most appear inactive or non-functional. The island's name itself draws from Finnic mythology, where "Hiisi" originally denoted sacred localities and various mythological entities.

The island is shrouded in legends of the golden realm's descendants who, guided by moonlight, journeyed countless miles to finally find refuge on these shores. This deep connection to lunar worship is evident throughout the island's architecture and customs.

Perhaps most intriguingly, Hiisi Island gained significant attention in the Genshin Impact storyline when it became the refuge for Columbina following her dramatic departure from the Fatui and her position as the Third of the Eleven Harbingers. This development prompted the Fatui to issue the "Palestar Edict," a mandate to retrieve her regardless of cost.

Key Locations on Hiisi Island

Hiisi Island features three main subareas that players should thoroughly explore:

1. Light-Bathed Platform - A stunning architectural marvel that catches the moonlight in spectacular ways

2. Silvermoon Hall - The central gathering place for the Frostmoon Scions

3. Various hidden grottos - Perfect for finding rare items and completing challenging puzzles

All Hiisi Island Quests Worth Completing

For travelers looking to maximize their experience on Hiisi Island, completing all available quests is essential. Here's a comprehensive list of all hiisi island quests currently available:

World Quests

• Polkka Beneath the Moon's Oracle - A fascinating journey that reveals ancient secrets of the island's inhabitants

• Blessings of the Frost Moon - Help the Frostmoon Scions with their sacred ritual

• Blessings of the Frost Moon (Part 2) - Continue your assistance with increasingly complex challenges

• Her Past - Uncover the mysterious history of one of the island's most enigmatic characters

Hidden Anecdotes

Several unmarked quests can be discovered by interacting with NPCs during specific times of the day. These often reward unique items and lore fragments that enhance your understanding of Hiisi Island's complex history.

Finding Those Elusive Oculi

Many travelers have reported difficulty locating all the oculi on Hiisi Island. The final two are particularly challenging, as they're hidden in locations that require specific environmental interactions.

For the two oculi that many players struggle with (as seen in recent community discussions), you'll need to:

1. Activate the moon phase puzzle near the eastern shore during nighttime

2. Use a Cryo character to freeze the water beneath the floating rock formation, allowing you to climb to the hidden cave entrance

Unique Features and Rewards

Hiisi Island hosts one special Domain that offers exclusive rewards and challenges. Additionally, the island features unique local specialties that are critical for ascending certain characters released in Version 5.5 and beyond.

The island's soundtrack, "Kathisma Chrysopoleos," creates a hauntingly beautiful atmosphere that enhances the exploration experience. This track is also available for use in the Serenitea Pot for players who wish to recreate the island's ambiance in their personal realm.

Connecting with the Frostmoon Scions

The indigenous Frostmoon Scions who call Hiisi Island home have their own unique culture and customs centered around lunar worship. Building reputation with this group unlocks exclusive rewards, recipes, and furnishing blueprints that cannot be obtained elsewhere in Teyvat.

Conclusion

Hiisi Island represents one of Genshin Impact's most atmospheric and lore-rich additions in recent updates. Whether you're hunting for those last two elusive oculi, completing all hiisi island quests, or simply absorbing the haunting beauty of this moon-worshipping realm, the island offers something for every type of Genshin Impact player.

As the story continues to unfold throughout 2025, Hiisi Island will likely remain a critical location in the ongoing narrative - particularly regarding Columbina's fate and the Fatui's response to her defection. Regular visits to check for new content are recommended for travelers who wish to stay current with Teyvat's evolving story.