Generates explosions to the sides of the player — left and right rather than front and back. This perpendicular coverage fills the gap left by weapons that focus on forward or backward fire, making Aura Blast a natural complement in builds where horizontal flanks are the threat. Level scaling increases the number of explosions, their damage, and radius.

Unlocked via Ruler Sword selection or Librarian purchase. Union evolution requires Hellfire — the evolved form of Fire Wand — alongside Aura Blast. Both must reach max level, which means running both Aura Blast and Fire Wand simultaneously and evolving Fire Wand into Hellfire during the run.

Max both Aura Blast (Lv 8) and Hellfire (Fire Wand evolved, Lv 8), then open an elite-drop chest after 10:00 for the Kardía Phlegeton union evolution.

Kardía Phlegeton Effect

After evolution calls forth a massive volcanic eruption — a large-scale explosion covering a wide area with lava and projectile debris. The eruption's blast radius handles dense enemy clusters at a scale far beyond the base weapon's sideways blasts.

• Sideways coverage pairs naturally with forward-facing weapons to close directional gaps
• Post-evolution volcanic eruption is one of the most wide-ranging area effects in the game
• Accessible unlock via Ruler Sword or Librarian
• Explosion type synergizes well with area-increasing passives

• Union evolution requires two weapon slots (Aura Blast + Fire Wand path)
• Fire Wand must be evolved into Hellfire before the union — additional setup time
• Pre-evolution coverage is limited to the sides — front and rear enemies require other weapons
• Dual-weapon management is required during the Fire Wand + Aura Blast phase

• Imelda: +10% Growth speeds both weapons to max level faster
• Area-focused characters: wider explosions amplify Kardía Phlegeton's eruption coverage
• Gennaro: extra projectile count increases explosion frequency

• Candelabrador: wider area expands explosion radius — the most direct multiplier for this weapon (top priority)
• Spinach: +10% Might raises per-explosion damage
• Clover: improved drops help secure Fire Wand's evolution materials
• Duplicator: higher explosion rate increases sideways damage density

• IX Divine Bloodline: crit compounding with explosion hits
• IV Soul Eater: movement speed bonus enables faster sideways movement to cover more ground with each explosion

• Early (0–10 min): Level Aura Blast and Fire Wand in parallel. Grab Candelabrador early to expand explosion radius. Practice horizontal movement to sweep the sides with explosions.
• Mid (10–20 min): Evolve Fire Wand into Hellfire, max both → Kardía Phlegeton union. The volcanic eruption immediately handles crowd clearing at a scale the base weapon cannot match.
• Late (20+ min): Kardía Phlegeton's eruption combined with Candelabrador's area expansion covers the full screen. Move into dense enemy clusters to center the eruptions on the highest-density zones.

Q: How do I unlock Aura Blast?
A: Via Ruler Sword selection or Librarian purchase (in-stage shop).

Q: How do I build Hellfire for the union evolution?
A: Max Fire Wand (Lv 8) with its required passive item and open an elite chest after 10:00 to evolve it into Hellfire. Then max Aura Blast alongside Hellfire for the Kardía Phlegeton union.

Q: Does the sideways explosion direction depend on where I'm facing?
A: The explosions generate to the player's sides (horizontal axis), not toward a faced direction. Front and rear enemies are not covered by Aura Blast alone — pair it with a forward-facing weapon for full coverage.