Stormterror Dvalin is one of the first weekly bosses you'll encounter in Genshin Impact, providing a unique aerial combat challenge. Here's a comprehensive guide:
Location
You face Dvalin in his lair, Stormterror's Lair, which is accessible after completing a significant portion of the early game story in Mondstadt.
Combat Mechanics
Phases
•Phase One: Starts on the platform. Dvalin is stationary, allowing for direct attacks. He'll periodically summon Anemo slimes or try to swipe at players.
•Phase Two: Dvalin takes flight. Players must use the floating platforms to reach him, deal damage, and cleanse corrupted spots on his back.
•Phase Three: Back on the ground, Dvalin becomes more aggressive with his attacks, introducing new mechanics like his breath attack and energy blasts.
Attacks
•Wind Breath: A wide-reaching Anemo attack that pushes players back.
•Claw Swipe: Close-range melee attack.
•Energy Blasts: Shoots out multiple Anemo blasts towards the player.
•Tail Sweep: If behind him, he might sweep his tail.
•Corrupted Spots: During flight, these appear on his body, which players must cleanse by attacking.
Strategy 
Team Composition
•DPS: Characters like Diluc, Keqing, or Razor for consistent damage output. Ranged characters like Amber or Fischl can be useful when Dvalin is airborne.
•Healers: Barbara or Qiqi for sustained healing; Bennett for both healing and attack buff.
•Support: Venti, if you have him, can be beneficial for crowd control and to help with platform navigation.
Tactics
•Platform Use: During the flying phase, use the updrafts created by Venti or certain game mechanics to ascend platforms.
•Cleanse Corruption: Focus on destroying the corrupted spots on Dvalin's back or claws to prevent his more devastating attacks.
•Dodging: Learn to dodge or use I-frames from bursts to avoid his high-damage attacks, especially his breath.
Environmental Mechanics
•Wind Currents: Utilize these for quick movement or to avoid falling off platforms.
Rewards
•Dvalin's Plume, Claw, and Sigh: Ascension materials for certain characters like Jean or Razor.
•Dream Solvent: A material used to convert boss drops into other forms of boss materials from the same boss.
•Artifacts: Gladiator's Finale, Wanderer's Troupe, and other artifact sets.
•Primogems, Adventure EXP, and other standard boss rewards.
Tips: 
•Resin Usage: Like all weekly bosses, Dvalin requires 60 Original Resin to claim rewards, or 30 for the first three weekly bosses of the week.
•Cooldown Management: Time your skills and bursts to maximize damage, especially when Dvalin is stunned or when his vulnerable spots are exposed.
•Aim for Weak Points: During the ground phases, aim for his head for critical hits.
•Bring a Bow User: Essential for hitting Dvalin when he's out of melee range, especially during the flight phase.
•Stay Mobile: Constantly move to avoid his energy blasts and breath attacks.
•Healing Items: Bring food for quick heals if your healer's abilities are on cooldown.
Note: Engaging with Stormterror Dvalin not only tests your combat prowess but also progresses the storyline of Genshin Impact, offering a blend of aerial and ground-based combat that requires adaptability and strategic use of characters and their abilities. |
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