Final Flood Day Guide

If your Flood Countdown hits zero before you offer the Idols, the Rainmaker's Flood ends your run. The final day is not a regular dive — it is a one-way descent to the deepest chamber of the Abyssal Pool where the Rainmaker waits. All eight Eldritch Idols must be in your possession.

Preparation begins five to ten days before the deadline. Confirm Idol count, max out your best diver's stats at the Town Hall, craft Eldritch-tier equipment, and clear the Infirmary so your primary diver starts at full Health and Sanity.

Verify eight Idols in inventory. Equip maximum oxygen capacity, strongest weapons, full light sources, and cutting tools. Assign your most experienced diver — ideally one with Unnatural Regeneration, high Apnea, and combat traits.

Stock the Workshop with backup consumables. Burn final Tributes for Nutrition and Morale buffers. Cancel nonessential Expeditions. Do not waste the last day on resource farming unless you are one Idol short.

The final dive path follows the deepest unlocked biome route. Enemies are at maximum density — avoid unnecessary combat. Use Maps to take the shortest known path. Boost judiciously; oxygen management determines success more than speed.

At the Rainmaker's chamber, interact with the offering altar and present all eight Eldritch Idols. Completing the ritual triggers the ending sequence and saves humanity from the Black Rain.

With five or fewer days remaining and fewer than eight Idols, prioritize Worship offerings and underwater altar sacrifices over resource dives. Each worship cycle adds one day. Target the nearest uncollected Idol with your highest-tier Diving Deck warp point.

Use our Flood Day Planner tool to calculate whether your remaining days support another biome blessing or if direct Idol rushing is the only viable path.