The relentless pursuit of strength in Roblox Weak Legacy 2 has reached a blazing new peak. For members of the Demon Slayer Corps, the ultimate goal this season is none other than Sun Breathing V2—a mythical evolution of the original breathing style inspired by the legendary swordsman Yoriichi Tsugikuni.

This awakened version doesn’t just look incredible—it’s a game-changing combat upgrade, bringing devastating damage output and deadly combo potential. With the ongoing UPD 4.75 updates in October 2025, the route to mastering V2 has become clearer.

Phase 1: How to Get Sun Breathing (V1)

Before chasing the V2 upgrade, you’ll need to first unlock Sun Breathing V1. This isn’t something you can just buy or pick up—it’s a blend of race restrictions, hidden items, and luck.

Requirements for Sun Breathing V1:

  • Be Human: Only human players can learn this style.
  • Sun Soul Bloodline (Optional but Helpful): Having the Sun Soul family greatly enhances your effectiveness and aligns your lore with Yoriichi’s legacy.
  • Find the Hidden Sun Soul Item: The most critical step! Look for a small glowing item—often referred to as the “Sun Soul.” It typically spawns in remote, hard-to-reach locations, such as near final boss arenas or on high mountain paths.
  • Optional Trainer Step: Once you’ve secured the item, talk to a Breathing Trainer to unlock the Sun Breathing style.

Phase 2: The Grind to Unlock Sun Breathing V2

Now comes the real test—earning Sun Breathing V2. Unlike the Moon Breathing V2 path, which involves fighting Kokushibo, the Sun V2 journey pits you against the strongest demon in the game—a final challenge that demands precision and mastery.

V2 Requirements & Strategies

1. Max Mastery on Sun V1

Before anything else, you’ll need to fully master every Sun Breathing V1 skill. This is the longest and most demanding part of the grind, but it’s essential for unlocking the next tier of power.

2. Defeat the Ultimate Boss

You must challenge and defeat the Ultimate Demon or Final Raid Boss—typically a version of Muzan or another original high-tier demon. Only by conquering this foe can you progress toward Sun V2.

3. Land the Final Move

The key condition for the unlock: deliver the finishing blow using a specific Sun Breathing V1 move, such as Dragon Sun Halo Head Dance. If someone else lands the kill, the upgrade won’t trigger.

4. RNG Factor

Even with every requirement met, unlocking Sun Breathing V2 isn’t guaranteed. The success rate is low, meaning you might need to face the boss multiple times before you finally claim your reward.

Recommended Strategy (October 2025 Update)

Getting the final hit is everything. Here’s how seasoned Slayers increase their odds:

  • Solo or Small Squad: Go solo or with trusted allies. In large raids, you may lose the chance to land the finishing blow.
  • Low HP Setup: Bring the boss down to around 1,000 HP before using your finisher.
  • Spam the Ultimate Move: As soon as the boss is nearly dead, unleash your ultimate Sun Breathing skill.
  • Watch for the Notification: If done correctly, you’ll see “Learned a New Skill” or “Unlocked Sun Breathing V2.” If not—reset, regroup, and try again

Why Sun Breathing V2 Is Worth It

Grinding for Sun V2 isn’t easy—but the reward is pure power and prestige.

  • Massive Damage: V2 moves can hit for tens of thousands of damage—perfect for endgame bosses and PvP domination.
  • Elite Combos: Moves like Fire Wheel and the V2 ultimate chain seamlessly for long, flashy combos.
  • Cinematic Style: V2 attacks feature dazzling fire animations and cinematic cutscenes, capturing the true spirit of Yoriichi’s technique.