As Travelers continue to explore the ever-expanding world of Teyvat, Genshin Impact's Version 4.2 update introduces a fresh wave of challenges in the picturesque yet perilous regions of Fontaine and Erinnyes Forest. The update, which has captivated players since its 2025 release, adds five formidable new Local Legends to test the mettle of even the most seasoned adventurers. These unique bosses, each with their own distinct combat mechanics and environmental puzzles, are scattered across the new landscapes, offering not just thrilling battles but also valuable rewards for those brave enough to seek them out. This guide provides a comprehensive overview of where to find these powerful foes, how to defeat them, and what treasures await the victorious.

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The Five New Local Legends of Fontaine

The Fontaine region and the adjacent Erinnyes Forest are now home to a diverse roster of Local Legends. Each presents a unique combat puzzle that requires specific strategies, team compositions, and sometimes, the completion of prerequisite world quests. The legends are:

  • Mageblade Corrouge - The Enigmatic Jellyfish

  • Rocky Avildsen - The Punching Powerhouse

  • Liam - Master of Elemental Havoc

  • Chassanion - Guardian of the Morte Depths

  • Deianeira of Snezhevna - Frosty Sentinel of the Ruins

Finding and defeating all five is a rite of passage for dedicated Fontaine explorers and a key step toward completing the region's combat-focused achievements.

Mageblade Corrouge: The Aquatic Duel

Floating serenely yet menacingly in a water-filled chamber southwest of the Weeping Willow, Mageblade Corrouge is often the first Local Legend players encounter. Access to its domain is granted only after completing the "The Wild Fairy of Erinnyes" world quest. The battle itself is a test of precision and timing rather than raw power. Corrouge attacks by launching slow-moving, homing projectiles.

💡 The key to victory lies in the Xenochromatic abilities found in Fontaine's waters. Players must utilize the Xenochromatic Octopus's power to grab these projectiles and redirect them back at the jellyfish. This counterattack deals massive damage, making the fight a satisfying puzzle of reflection. Due to this straightforward mechanic, many consider Mageblade Corrouge the most approachable of the new legends.

Rocky Avildsen: A Test of Reflexes

Venturing southeast of the Weeping Willow, near a quaint, abandoned cottage, travelers will stumble upon Rocky Avildsen. This legend foregoes complex mechanics for sheer, overwhelming physical force. His combat style is brutally direct, featuring devastating punch combos and ground-shaking Area-of-Effect (AoE) attacks that can decimate an unprepared team in seconds.

🛡️ Survivability is paramount in this fight. Bringing a robust shielder like Zhongli or a character with high-damage reduction is highly recommended. The battle becomes a dance of dodges and well-timed counters. Mastering his attack patterns and knowing when to strike during his brief recovery windows are the skills that will lead to victory against this powerhouse.

Liam: The Elemental Inferno

Northeast of the Weeping Willow lies a contaminated pond, and within it, the volatile Local Legend known as Liam. This foe requires the same world quest clearance as Mageblade Corrouge. Liam's danger comes from his relentless and wide-ranging Elemental attacks, primarily infused with the destructive power of Pyro. His abilities can cover large portions of the battlefield, leaving little room for error.

A single misstep can lead to a swift defeat, as his charged attacks hit with tremendous force. To counter this, a dual-layered defense strategy works best. A reliable healer, such as Kokomi or Bennett, is essential to recover from inevitable damage. Pairing the healer with a shielder creates a safety net, allowing your main damage dealers the time they need to whittle down his health. This fight emphasizes team synergy and positioning above all else.

Chassanion: The Depths' Guardian

The elusive Chassanion resides in the Morte Region, and its location is a puzzle in itself. It presents players with a conditional spawn based on world progression. For those who have not yet unsealed the mysterious Sealed Ruined Tower, Chassanion can be found by teleporting to the underwater waypoint south of the Fort Charybdis Ruins and exploring the depths.

However, for travelers who have progressed further and unsealed the tower, the encounter changes. They must enter the tower's central platform and dive downward into the abyss below. The combat mechanics echo those of Mageblade Corrouge, once again requiring the use of the Xenochromatic Octopus's abilities. Chassanion attacks by generating large, dangerous bubbles; the player must seize control of these bubbles and launch them back to deal significant damage. It's a battle of aquatic manipulation.

Deianeira of Snezhevna: The Cryo Vanguard

The final legend, Deianeira of Snezhevna, is locked behind the "An Expected Plan" world quest. She stands guard within the ruins southeast of the Tower of Ipsissimus, a sentinel from a distant, snowy land. Her combat style is sophisticated and punishing. She wields Cryo powers with deadly efficiency, capable of triggering potent Elemental Reactions like Frozen and Superconduct, which can immobilize and cripple your team.

❄️ A strong shielder is non-negotiable here. Characters like Layla or Diona, who can provide both shielding and Cryo resistance, are invaluable. The fight demands constant awareness to avoid her area-denial attacks and to manage the debilitating chill she imposes on the battlefield. Defeating her feels like a true accomplishment, marking the end of this challenging gauntlet of Local Legends.

Bountiful Rewards for the Victorious

Overcoming these powerful adversaries is not without its lucrative benefits. Each victory is commemorated with a unique achievement, contributing to a player's overall accomplishment tally. More tangibly, each legend grants a generous helping of Primogems—the precious currency for Wishes. Additionally, many of these battles are tied to the environment, and victory often triggers the appearance of luxurious Precious or Luxurious Chests in the vicinity, containing more Mora, Adventure EXP, and potentially valuable artifacts or weapon enhancement materials.

Perhaps the most intriguing reward comes from specific legends, who have a chance to drop the Mysterious Xenochromatic Crystal. This unique item, as of 2026, is still a subject of speculation within the community. While its exact purpose in future updates remains unknown, it is widely believed to be a material for forging powerful new weapons or catalyzing special events related to Fontaine's lore and the mysterious Abyss. Collecting these crystals is considered a wise investment for any forward-thinking Traveler.

In summary, the Local Legends of Version 4.2 offer a perfect blend of exploration, puzzle-solving, and intense combat that defines the Genshin Impact experience. They encourage players to fully engage with Fontaine's new mechanics, master its environments, and refine their team-building strategies. The journey to find and defeat all five is a rewarding trek through some of the game's most beautiful and dangerous new landscapes.