The Black Star Farm

Overview

The Black Star is one of the two Eldritch Horrors that must fall before the Searing Exarch can be faced, fought in the Polaric Void behind a Polaric Invitation. It is among the fastest boss targets in the game — roughly half a minute of fight — and it pays in Eldritch currency and Exarch-side embers rather than one jackpot unique, so returns stay steady across a short run of kills instead of hanging on a single rare drop.

Setup

• Polaric Invitation — one consumed per run, placed in the map device. The tradeable version opens area level 83; the quest version opens 79.
• Rare and corrupted — every drop figure here assumes a rare, corrupted invitation. Drop rates scale with area item quantity, and the high end of each published range is exactly that case. A plain invitation yields materially less.
• Run time — about one minute per run. That is the house model rather than a measurement: roughly 30 seconds for the kill on a good build clearing it cleanly, plus 30 seconds of overhead for portal time, travel and loading the invitation into the map device. It is not a floor anyone hits.

The Encounter

• Astral Avalanche — comets fall diagonally from the boss towards the centre; dodge up and down rather than sideways, and shelter behind blue-section pillars.
• Solar Storm — a tracking fire beam, low damage; stay close and pivot around the boss, or use red-section pillars.
• Deep Space — a fast cold wave that can freeze; sidestep it.
• Star Flare — a small circular fire slam; keep moving and it misses.
• Simulacrum — spawns clones to distract you; ignore them and keep hitting the real boss.
• What to bring — the arena's rotating fire and cold halves swap which element hurts you, so carry both resistances plus suppression, block or a guard skill for the avalanche.

How These Numbers Were Calculated

• The method. A synthetic 100-kill sample built from published drop rates, not recorded runs. A 5% chance is counted five times across the hundred, a 20% chance twenty times. Expenses are one invitation multiplied by the same 100 runs. The hourly figure spreads the net total over 100 runs at one minute each — 30 seconds of fight plus 30 seconds of overhead — which is a modelled duration, not a measured one, and the single assumption the per-hour number is most sensitive to.
• The high end of each range. Drop rates are published as a low and a high figure; the high figures are used throughout, representing rare and corrupted invitations which adds quantity which increases drop chance of certain items. Running plain invitations cuts the drop side substantially while leaving the entry cost broadly similar.
• The rates are estimates. They are crowdsourced, drawn from version 3.20.0 (n=2450) and version 3.22.0 (n=3600), and scale with area item quantity. Nothing more recent has been sampled, and results over a short run of kills will differ from the model.
• Concentration. No single drop carries this strategy. Eldritch Chaos Orbs are the largest line at about 28% of modelled profit, with Polaric Devastation at 25%, Eldritch Orbs of Annulment at 24% and Grand Eldritch Embers at 18%. That spread is unusual for a boss and makes the figures more robust than a strategy resting on one rare unique — but it ties returns to the Eldritch currency market as a whole, so a broad crash in ember or orb prices moves the whole number at once.