Quick Answer
To beat St. Lucia, kill her assassins, wait out ghosts, and shoot the projectiles appearing in the darkness. Destroying those projectiles makes Lucia burn; missing them sets you on fire. Keep healing through her final scream attacks, then collect three separate rare drops.
How do you beat St. Lucia's phases in order?
You should attack after Lucia spreads her threads, interrupt assassins, and save your next shooting window for returning ghosts.
St. Lucia waits in the throne room on the Castle's final floor. You can use the storage chest just before her chamber to prepare equipment or stash items. If you are choosing equipment, compare SULFUR weapon builds before entering.
Wait for her opening position
Let Lucia reach the arena's center and spread her threads before beginning your main attack. She floats around the chamber and attacks from range, including burning beams. Keep moving while you handle her attacks.
Kill the cultist assassins immediately
Switch your attention to assassins as soon as they appear. Grenades, mines, or other explosives are useful for eliminating them before they interrupt your movement. Return your attention to Lucia once you have dealt with them.
Survive the ghosts, then resume shooting
During the ghost sequence, concentrate on avoiding damage. Resume shooting when the ghosts return to Lucia. Her powerful screams are another attack you need to survive during the encounter.
Shoot the projectiles when darkness falls
Look toward the center of the darkness for appearing projectiles. Destroy them before they activate to make Lucia burn instead of you. This is your immediate priority when the room goes dark.
Handle the repeated summons and darkness
At around 50% health, Lucia summons assassins again. Near 40%, she repeats the darkness attack. Repeat the same responses: eliminate assassins immediately, then shoot the projectiles during darkness.
Heal through the final screams
During the final stretch, Lucia stays near the center with her threads extended. She relies heavily on screams here. Heal when needed and maintain pressure until she falls.
What should you shoot when St. Lucia blinds you?
You should shoot the projectiles appearing in the center of the darkness before they activate.
Successfully destroying them causes Lucia to burn. Failing causes you to catch fire instead. Treat the darkness as an attack you can interrupt, rather than simply waiting for visibility to return.
Lucia can darken the entire room, leaving faint glows from summoned eyes. Use the projectile response above when she darkens the room.
Lucia becomes temporarily invulnerable during scripted phase transitions. Wait for the transition to finish before committing your next attack.
What is St. Lucia weak to?
You can turn her darkness attack against her, but no special elemental weakness is established.
Her listed HP is 8,000. Fire, Frostbite, Charm, Petrify, Earth, and Bleed each have a listed 100% value. Those equal values give you no listed advantage between these effects.
The actionable opening is the darkness sequence: destroy its projectiles and Lucia burns instead of you. Avoid choosing an element solely because her own attacks involve fire. If you are comparing effects, consult the SULFUR enchantments guide before committing your equipment.
What does St. Lucia drop?
You receive three separate items, each rolled independently from the same rare loot pool.
These are three rolls, rather than three fixed rewards. There is no additional guaranteed Sulfur payout. The possible rewards include the following items:
| Reward group | Possible drops |
|---|---|
| Enchantment scrolls: Aftershock–Fear | Scroll of Aftershock, Scroll of Chain Lightning, Scroll of Chaos Strike, Scroll of Charm, Scroll of Corpse Explosion, Scroll of Poison Blood, Scroll of Crusader, Scroll of Dark, Scroll of Earth, Scroll of Surge, Scroll of Fear |
| Enchantment scrolls: Embers–Noxiosa | Scroll of Embers, Scroll of Flame Thrower, Scroll of Frostbite, Scroll of Holy Fire, Scroll of Holy Purge, Scroll of Lava, Scroll of Least Resistance, Scroll of Light, Scroll of Nature, Scroll of Noxiosa |
| Enchantment scrolls: Pesticide–Water | Scroll of Pesticide, Scroll of Petrification, Scroll of Petroleum, Scroll of Plague, Scroll of Prism, Scroll of Explosions, Scroll of Rocket Launcher, Scroll of Sacrifice, Scroll of Slush, Scroll of Storm Surge, Scroll of Thunderbolt, Scroll of Toxic Lobotomy, Scroll of Voodoo, Scroll of Water |
| Weapons and attachment | Deathstar PG, Tailor Marksman MKII, Reflex Sight |
| Other equipment and items | Guild Approved Cuisine, Dunce Cap, Pope Hat, Insurance, Crypt Key |
| Chamber Chisels | Chamber Chisel (9mm), Chamber Chisel (12Ga), Chamber Chisel (.50 BMG), Chamber Chisel (5.56mm), Chamber Chisel (7.62mm) |
| Valuables | The Cost, Famous Painting |
If you receive a scroll, compare it with the best SULFUR scrolls before using it.
Where do you go after beating St. Lucia?
You take the portal revealed when part of the Castle wall collapses after her defeat.
The portal removes the curse behind the church and opens your path to the Forest. For another encounter, use the SULFUR bosses guide to find the relevant fight.
FAQ
You face the same Castle boss under the names St. Lucia, Saint Lucia, and Sankta Lucia.
St. Lucia waits in the throne room on the Castle's final floor. A storage chest stands just before her chamber.
Yes. Sankta Lucia is another name for St. Lucia, the Castle boss and leader of the Black Guild.
Shoot the projectiles appearing in the center of the darkness before they activate. Success makes Lucia burn; failure sets you on fire.
She summons assassins again at around 50% health. Near 40%, she repeats her darkness attack.
You get three independent item rolls from her rare loot pool. No specific item or additional Sulfur payment is guaranteed.
Yes. Her defeat reveals a portal that removes the curse behind the church and opens the route into the Forest.