The Bathysmal Vishap Herd is one of the more unique Field Boss encounters in Genshin Impact. This boss battle involves facing not just one, but multiple adversaries in a sequence, adding a layer of complexity to the fight. Here's a detailed overview.
Image via HoYoverse.
The basics
Location: Enkanomiya: This boss can be found in Enkanomiya, the underground region beneath Watatsumi Island in Inazuma. Specifically, it appears near the Taidal Pillar area.
Appearance: The Bathysmal Vishap Herd consists of several dragon-like creatures known as Vishaps, which are found in the Abyss. They have a serpentine body with crystalline structures and an ominous, glowing appearance, reflecting their elemental natures.
Combat Mechanics
•Phases: Unlike many bosses that have straightforward phases, the Bathysmal Vishap Herd involves fighting multiple foes in succession:
•Initial Encounter: You'll face a group of lesser Vishaps first, which are weaker but can overwhelm if not managed properly.
•Main Boss: After dealing with the initial wave, you'll face the primary Bathysmal Vishap, which is larger and more formidable.
Smaller Vishaps
•Projectile Attacks: Fire elemental projectiles.
•Charge Attack: Rush towards the player, dealing physical damage.
Primary Bathysmal Vishap
•Crystal Spikes: Summons spikes from the ground that can erupt in AoE damage.
•Elemental Beam: Fires a powerful beam attack that sweeps across the battlefield.
•Slam Attack: Uses its body to slam the ground, creating shockwaves.
•Summoning: Can summon additional lesser Vishaps to aid in battle.
Strategy 
•Crowd Control: Handling the initial wave efficiently is key. Characters with AoE capabilities like Venti or Sucrose can group and CC enemies effectively.
•Elemental Weakness: While specific elemental weaknesses aren't as pronounced, using characters that can trigger reactions like Overload (Pyro + Electro) or Freeze (Hydro + Cryo) can manage the swarm better.
Avoiding Damage:
•Mobility is crucial due to the multiple enemies. Characters with high mobility or crowd control like Jean or Kazuha can dodge and reposition easily.
•Using shields from characters like Zhongli can mitigate damage from the numerous attacks.
•Focus Fire: Once you've managed the initial wave, focus on the primary Bathysmal Vishap. High DPS characters like Hu Tao or Eula can deal significant damage quickly.
•Elemental Reactions: Utilizing reactions can not only deal damage but also control the battlefield through effects like Freeze or Electro-Charged.
Team Composition
•DPS: Characters like Keqing or Xiao can deal with the initial crowd and then switch to the main boss effectively.
•Supports: Characters like Fischl for Electro support or Xingqiu for Hydro can help manage elemental reactions.
•Healer: A healer like Diona or Qiqi can keep your team alive, especially if overwhelmed by the initial wave.
•Utility: Characters like Venti or Sucrose for crowd control, or Zhongli for his shield and elemental resistance.
Rewards
•Defeating the Bathysmal Vishap Herd grants:
•Primogems
•Hero's Wit
•Mystic Enhancement Ore
•Talent materials like "Teachings of Gold" or higher tiers for character ascensions.
Tips: 
•Prioritize Targets: Focus on the most immediate threats first, then shift to the main boss.
•Environmental Awareness: Enkanomiya's environment can offer strategic advantages, like using pillars for cover.
•Switching: Be ready to switch characters frequently to handle different combat scenarios, from crowd control to single-target DPS.
•Elemental Mastery: Characters with high Elemental Mastery can benefit from the frequent reactions, especially when dealing with multiple enemies.
The Bathysmal Vishap Herd stands out for its dynamic combat scenario, requiring players to adapt their strategies between crowd control and focused boss combat. This makes for an engaging and challenging fight, testing players' ability to manage multiple threats simultaneously in Genshin Impact.
