Medusa

Quick answer: Medusa's gimmick is petrification — when she's about to meet Rose's gaze, turn Rose's back to her; rolling and jumping do not avoid it. Her tail only reaches the lower platforms, so fight from the upper platform. Around 25% HP she begins her ultimate: tail slams on both lower platforms, then a multi-beam sweep you survive by hiding behind the large rock opposite her. She is fought in Serpent's Lair, below the cemetery, and seals into "The Prophetess" Arcana, granting Petrifying Gaze.

Who is Medusa?

Medusa is drawn from Greek mythology and is one of Castlevania's longest-running foes. Across the series she appears in two classic forms: the full Medusa boss, and the Medusa Heads — snake-haired projectiles that petrify the player.

In Belmont's Curse she's a boss in her own right, fought under the Arcana title "The Prophetess", in Serpent's Lair.

Where to find Medusa (Serpent's Lair route)

Polygon documents the route (Polygon, level C):

Main route: Holy Innocents' Cemetery → Paris Streets → Street of the Tomb Masons → Fountain of the Lost → drop into the water → Serpent's Lair. The boss room is the last room on the left; a Mirror of Life sits on the right.

Alternate route: Hollow Tree / Pauper's Grave → Roman Aqueduct → Roman Baths → Hot Springs.

If you drop off a platform in the arena, whip the purple anchor to climb back up.

The fight at a glance

Gimmick: petrification — one glance can end the run, so the fight is about controlling where you look, not just where you stand.
Arena: upper and lower platforms. The tail attack only hits the lower platforms, so the upper platform is the safer position.
Ultimate phase: around 25% HP she changes behavior (sources disagree — some report a shift at 50% then again at 25%), adding a multi-beam sweep you survive behind the falling rocks.

Attack patterns

Petrifying gaze — the core move. When Medusa is about to meet Rose's gaze, turn Rose's back to her. Rolling or jumping does not dodge it. The in-game ghost hint is "look away when Medusa is about to meet your gaze".
Slam and follow-up slash — a close-range sequence; back off after the slam rather than trying to punish between the two hits.
Tail attack — only reaches the lower platforms. Stay up top and it never connects.
Hair beam — a sweeping beam; cover is positioning, not dodging.

How to beat Medusa

Fight from the upper platform. It shuts down the tail attack entirely. Use short combos and drop back up.
Read the gaze, then turn your back. This is the one move that ignores your positioning — treat it as a rhythm check, not a dodge.
Survive the ultimate at ~25%. The screen shakes, her tail slams both lower platforms, and she follows with slashes. Move to the upper platform opposite Medusa during the tail slams.
Then hide behind the large rock. For the multi-beam sweep, get behind the large rock on the lower platform opposite her. Smaller rocks fall after the second beam and can damage Rose — keep moving.
Bring a ranged answer. Polygon recommends Lance + Holy Cross for this fight — reach matters while you're pinned on platforms.

Weakness and damage

No documented elemental weakness. Medusa is a test of her move cycle, not a DPS race. (Some single-source guides report vulnerability to Bleed and Burn status effects, but this is not cross-verified — level D.)
Health / XP: reported at roughly 1,500 HP and 500 XP — a single community source, not officially published (level D), so treat it as approximate.

Rewards

Defeating Medusa seals her into an Arcana and drops progression items:

The Prophetess (Arcana) — grants the Petrifying Gaze ability, letting Rose petrify enemies the way Medusa did.
Prophetess' Key — a progression key; one of the keys needed for the catacombs gate.
Rusted Harpē & Aegis — equipment drops.

The Arcana title is "The Prophetess"; the ability it grants is "Petrifying Gaze". Same boss, two names — don't count them separately.

After Medusa

The Prophetess' Key is one of the keys that opens the catacombs gate, so Medusa is a required step rather than a detour. Medusa's Arcana also gates petrification-based puzzles and routes later in the castle. See All Bosses in Order for where she sits in the run, and the Arcana system for how her ability opens later areas.

Sources & verification

Location route (Serpent's Lair), slam/slash, anchor climb, ultimate at ~25%, boulder cover, smaller rocks, recommended Lance + Holy Cross, Prophetess' Key use — Polygon (level C).
Look-away counter, tail limited to lower platforms, rage phase — cross-checked across multiple community guides (level C). Sources disagree on whether the shift begins at 50% or 25%; both are flagged.
HP / XP — single community source (level D), not officially published; marked approximate.
Rewards — community guides (level C).
Last verified: October 24, 2026.

Related: Bosses · Arcana System · The Fallen · Carmilla · Talos