Catarina Farm

Overview

Catarina, Master of Undeath is the leader of the Immortal Syndicate, fought in the Mastermind's Lair behind a Syndicate Medallion. Every kill guarantees one unique from a fixed pool, and the fight also produces Veiled Exalted Orbs, Allflame Embers of Kulemak and Zorath's Eye of the Endless. It is a short, self-contained boss run, but the profit rests almost entirely on the veiled currency rather than the unique pool, and the medallion is expensive enough that the margin is narrow.

Setup

• Syndicate Medallion — one per run, used directly in the map device. No map is consumed.
• Run time — about two and a half minutes end to end. That is a two-minute kill for a good build clearing it cleanly, plus thirty seconds for portals, opening the Forbidden Vault and the run through the Unearthed Hideout to the Sculpture Garden. It is a house estimate rather than a measured figure, and not a floor anyone hits.

The Encounter

• Rollout — she teleports to you and charges an area attack for 200% more damage; the area grows the further you move away from her.
• Scythe Swing — a long-range scythe attack for 100% more damage that cannot be evaded.
• Volatile Skeletons — at roughly 40% life she becomes invulnerable and heals back to full, seeding the floor with skulls that become exploding crawling skeletons after ten seconds. Walking over them while they are being summoned destroys them first.
• Blackflame arena — after that heal, the four quadrants ignite and inflict a fire damage over time debuff while you stand on them, leaving only the cross-shaped pathway clear. The central sculpture then fires waves of physical damage along the paths in a clockwise pattern, with green embers marking which path is next.
• Soul Mortars — barrages of soul projectiles fired in front of her, partly converted to fire damage.
• Sideways Carpet Bomb — scatters small green bombs across the floor that detonate in sequence.

How These Numbers Were Calculated

• The method. These figures are a synthetic sample of 100 kills built from the wiki's published drop rates, not recorded runs. A drop chance in percent is read directly as a count over 100 kills: a 25% chance becomes 25 drops, a 60% chance 60 drops. Expenses are one run's Syndicate Medallion cost multiplied by the same 100 runs, and the hourly figure is the net total spread over 100 runs at two and a half minutes each — about four hours and ten minutes. The run duration is an assumption of the model, not a measurement.
• The rates are estimates. The drop table is crowdsourced from version 3.26.0 with a sample size of 462, and the page itself warns that actual rates may vary. Zorath's Eye of the Endless is marked as a preliminary estimate. Nook's Crown is only bounded at under 0.5%, so its count is an upper limit. Results over a short run of kills will differ substantially.
• Only the four-mod Cane of Kulemak is counted. The guaranteed unique pool also contains a plain or three-veiled-mod Cane at 17%, which is excluded here, so roughly one kill in six produces a unique the model assigns no value to.
• Concentration. Veiled Exalted Orb alone carries about 71% of modelled profit on a 25% drop chance, and together with Bitterbind Point at 10% the two account for roughly 91% of it. This is a bet on two drop chances and two prices. A stretch of kills producing neither is an ordinary outcome, not a sign the strategy has stopped working — and because the medallion accounts for about 92% of gross revenue, a modest rise in its price or fall in veiled currency prices is enough to erase the margin entirely.