Anno 117 Prophecies of Ash: what the volcano really changes

Cinis offers roughly twice the buildable land of the largest island in the base game. At its center, a volcano can shut down mines, hurl rock across residential districts, and cut output from farms and fisheries. Anno 117’s most generous terrain is therefore also the one that demands the deepest reserves.

That trade-off is more precise than a vague promise of “volcanic content.” Caecilia, obsidian, coal mines and the cult of Vulcan tie the disaster directly to production chains. They let us read the DLC through its systems without pretending to have spent two weeks on the island — which is exactly what the earlier version of this article wrongly claimed.

Cinis expands Latium instead of adding a side session

Prophecies of Ash released on April 30, 2026. The DLC extends northern Latium with six islands: three medium, two small, and Cinis. That last one is not a separate region you load from the world map. It slots into the existing province and can be added to a save already in progress.

That choice matters. Trade routes, population and established chains all stay relevant. Cinis does not force you to restart an empire to reach its content. Instead it offers a new center of gravity, with more beaches, rivers and mountain slots than ordinary islands.

Ubisoft puts its buildable surface at roughly twice that of the base game’s largest island. For megacity builders, that is the immediate selling point. For Anno’s design, it is also a risk: an enormous island softens the logistical pressure that normally gives sea routes and island specialization their value.

The volcano exists precisely to put friction back into all that space.

The volcano is a five-act economic loop

The official cycle has five phases, not four. During the calm, the island runs normally. The prelude brings tremors and light damage. The eruption interrupts anything built on mountain slots while flaming rocks strike buildings. The volcanic winter that follows drops the productivity of farms and fisheries, along with several well-being indicators.

The final phase, the bloom, flips the logic. Rain clears the air, lifts happiness, and turns ash into an agricultural bonus. Each eruption raises Cinis’s soil level. That bonus is first capped after three cycles; research then lets you push the ceiling to five.

This structure avoids a purely punishing disaster. You are not just handed a repair bill — you accept a spell of disorder to earn more productive land. The strategic problem becomes temporal. You need stockpiles before the winter, protection for exposed buildings, and a plan to exploit the rebound rather than simply rebuild what was there.

Obsidian ties the disaster to the economy

The eruption also produces obsidian. It appears as a by-product of mines and quarries after a cycle, and some hurled rocks can be recovered once the danger passes. The resource feeds statuettes and Latrunculi game sets, or trade with Caecilia.

So the new trader is not just a portrait bolted onto the harbor. Her missions introduce the story of Cinis and how the volcano works, while her specialists can alter an island’s fertilities or mining capacities.

The cult of Vulcan completes the picture. Its boons cover mining and fire safety, and it unlocks coal mines. Those can occupy any mountain slot without needing a particular fertility. The DLC thus links its theme to several layers of the city-builder at once: extraction, production, religion, trade and risk management.

Turning the volcano off changes what the DLC is worth

Ubisoft lets you tune the volcano’s intensity or disable its disruptive phases. That safety valve keeps a disaster mechanic from making Cinis unusable for players who build mainly for aesthetics.

The disabling is not neutral, though. Without new eruptions, the soil level and the farming bonus slowly fade. You keep the enormous canvas, but you give up the loop that mechanically justifies the abundance.

This is where the buying decision clarifies. If your goal is simply the largest surface in the series, Cinis delivers that directly. If you want new chains as structural as a full Anno 1800 region, the scope is more modest. Prophecies of Ash deepens Latium; it does not create a second economic game.

The real cost is in the preparation

The eruption does not threaten every activity equally. The explosive phase halts production tied to mountain slots. The winter that follows hits farms and fisheries. An economy concentrated on Cinis therefore stacks two successive weaknesses: extraction stopped, then food slowed.

That sequence gives warehouses and outside routes a concrete job. Importing food from another island shields your population during the volcanic winter. Holding coal or mined goods keeps a downstream chain from stalling when the volcano blocks the mountains. Visible damage is only part of the problem; the flow interruption can outlast the fire.

The bloom bonus then rewards players who kept their city running rather than those who only repaired quickly. With enriched soil, the same farms produce more and gradually offset the reserves you burned. The full loop reads less like “disaster, rebuild” and more like “prepare, interrupt, accelerated recovery.”

Difficulty settings also change how much damage and obsidian each cycle produces. Lowering the violence can be smarter than switching the cycle off entirely: you keep the bloom and the obsidian economy without turning every eruption into a maximum test of your reserves.

Who Prophecies of Ash makes sense for

The DLC looks most relevant for two profiles. The first wants a far larger Roman capital without leaving their current save. The second enjoys systems where a temporary disruption can be turned into a production advantage.

Players who hate seeing their chains interrupted can soften or cut the volcano, but they will neutralize much of the strategic angle. Conversely, anyone hoping for a constantly punishing disaster may find the bloom too generous: the system is built as a cyclical investment, not permanent survival.

The useful question is therefore not whether Cinis contains enough land. It plainly does. It is whether you enjoy building redundancy into an economy well before the warning arrives. A second food route, spare warehouse capacity and production spread across several islands become part of the design rather than emergency busywork. Repair services, supply discipline and mountain-slot placement matter before the first projectile falls, not after it. That is a narrower appeal than a new region, but also a more coherent one: the island asks you to use systems Anno already has with greater discipline.

For where this content sits in the game’s year, our Anno 117 Year 1 roadmap also covers The Hippodrome and Dawn of the Delta. Prophecies of Ash does not reinvent Anno 117 — it gives an identity to an island that could have been mere oversized terrain, and the volcano turns space into a genuine choice: build bigger, provided you organize the empire to weather the next winter.

Sources

• Ubisoft — Prophecies of Ash is available now
• Anno Union — travelling to the volcano island
• Prophecies of Ash on Steam