Genshin Impact's Hiisi Island has become one of the most intriguing locations in the game since its introduction in Version 5.5 "Luna I". This mysterious sanctuary in Nod-Krai continues to captivate players with its ancient forests, rich lore, and challenging quests. Whether you're a newcomer or returning player in 2025, this comprehensive guide will help you navigate all Hiisi Island has to offer.

The Mystical Home of the Frostmoon Scions

Hiisi Island stands as a testament to Genshin Impact's ever-expanding world. Shrouded in mist and ancient magic, this island serves as the home of the Frostmoon Scions, a group deeply connected to the worship of the Moon Goddess. According to local legends, descendants of a golden realm journeyed countless miles guided only by moonlight before finding refuge on these shores.

What makes this location particularly fascinating is its connection to larger storylines within Genshin Impact. After departing from the Fatui and relinquishing her position as the Third of the Eleven Harbingers, Columbina sought refuge near Hiisi Island, prompting the Fatui to issue the "Palestar Edict" to retrieve her regardless of cost. This ongoing narrative thread continues to develop in 2025, with new questlines exploring the aftermath of these events.

Key Locations on Hiisi Island

The island features three distinct subareas, each with unique characteristics and challenges:

1. Light-Bathed Platform - A stunning elevated area where moonlight concentrates, creating unusual phenomena and housing several puzzles

2. Silvermoon Hall - The central gathering place for the Frostmoon Scions, containing important NPCs and quest givers

3. The Ancient Forest - Added in the 2024 expansion, this dense woodland area contains hidden paths and secret treasures

Helka, a knowledgeable NPC on the island, mentions that Hiisi contains relics with designs similar to Secret Source technology, though most appear inactive or non-functional. Exploring these ancient mechanisms has become a favorite activity for players seeking to uncover the island's mysteries.

Essential Hiisi Island Quests

For players looking to fully experience all Hiisi Island has to offer, completing these quests is essential:

• Polkka Beneath the Moon's Oracle - The introductory quest that unlocks the island's main storyline

• Blessings of the Frost Moon - A two-part quest series that reveals crucial lore about the Frostmoon Scions

• Her Past - A deeply emotional quest exploring Columbina's history

• Moonlit Echoes - Added in 2025, this quest explores new areas of the island previously inaccessible

Finding All Hiisi Island Oculi

One of the most common challenges players face is locating all the specialized oculi scattered across Hiisi Island. These collectibles are essential for upgrading the local Statue of the Seven and unlocking rewards.

Some oculi are particularly tricky to find, especially the two located near the northern cliffs. To access these:

1. Climb to the highest point of the Light-Bathed Platform

2. Use the special wind current that appears during nighttime hours

3. Glide northwest toward the unmarked cliff face

4. Look for a small cave entrance partially hidden by vegetation

5. Inside, you'll find both oculi along with a luxurious chest

Many players in 2025 still struggle with these particular collectibles, as they're designed to be discovered only after completing certain island quests.

Local Specialties and Resources

Hiisi Island features unique local specialties that can't be found elsewhere in Teyvat:

• Frostmoon Petals - Glowing flowers that bloom only under moonlight

• Crystal Marrow - Rare mineral deposits with unusual properties

• Silverfin - A unique fish species that can be caught in the island's coastal waters

These materials are essential for ascending certain characters and crafting specialized equipment.

The Musical Heritage of Hiisi

One of the most distinctive aspects of Hiisi Island is its haunting soundtrack. "Kathisma Chrysopoleos" from The Shimmering Voyage Vol. 5 creates the perfect atmosphere for exploring this mystical location. The music shifts subtly between day and night, with additional melodies appearing during specific weather conditions or quest moments.

Etymology and Cultural Influences

The name "Hiisi" draws from Finnic mythologies, where it originally denoted sacred localities and various types of mythological entities. In Christian-influenced folklore, hiisi were depicted as demonic or trickster-like entities. This connection to real-world mythology adds depth to the island's lore within Genshin Impact.

Completing All Hiisi Island Quests in 2025

For players aiming to complete everything Hiisi Island has to offer, follow this recommended approach:

1. Begin with the main storyline quests to unlock basic island functionality

2. Explore each subarea thoroughly, marking unusual features on your map

3. Complete the world quests in order of difficulty (Polkka → Blessings → Her Past)

4. Search for hidden oculi and chests, using the resonance stones when necessary

5. Challenge the island's domain for valuable rewards

6. Return to previously inaccessible areas after gaining new abilities

The developers have maintained Hiisi Island exceptionally well since its introduction, adding new content and refining existing features with each major update. The 2025 expansion has made this location even more rewarding for dedicated explorers.

Whether you're drawn to Genshin Impact's combat, storytelling, or exploration, Hiisi Island offers something special for every type of player. Its blend of mystery, beauty, and challenge represents what makes this game continue to thrive years after its initial release.