earch the eed

a tool for

lay the pire II

Drag and drop your progress.save here ? Windows
%APPDATA%\SlayTheSpire2\steam\{your-steam-id}\profile0\saves\progress.save macOS
~/Library/Application Support/SlayTheSpire2/steam/{your-steam-id}/profile0/saves/progress.save Use profile1, profile2, and so on for later save slots.

Search filters

Card offers

Card is offered at least X times within the first N fights.

Relic order

Relic appears within the first N draws of its rarity. ?

Events

Event appears within the first N events of an act. ?

Neow's offer

Neow must offer at least one of these blessings.

Select blessings

Curse cannot be one of these:

Select curses

Curse must be one of these:

Select curses

Neow's offer includes this card, relic, or potion:

Ancients

Pick the ancient that must appear in act 2 or act 3, then choose the options it must offer. Option matches are base-case. Acts 2 and 3 read your live deck.

Act 2 ancient.

Select ancient

Act 3 ancient.

Select ancient

How accurate is this?

This tool reverse-engineers Slay the Spire 2's random-number generation from the shipped game and reproduces it bit-for-bit. When the inputs match your game, the output matches your game. Accuracy falls into three tiers.

Exact

Anything decided up front from the seed alone: the act order, Neow's three offers, the full relic order (one shuffled deck per rarity), boss and elite order, and the event rotation. These do not depend on how you play, so they are exact for the seed and character you enter.

Exact up to your first detour

Card rewards and gold are dealt in order along an assumed route: every monster fight in dealt order, then the boss, per act. They stay exact until you deviate from that route (skip a fight, take an event or shop instead, pick up an extra combat). After your first detour the remaining rewards shift.

Deck-conditional or assumption-based

A few things read state the seed alone can't know:

  • Unlocks. Without a progress.save, predictions assume a fully unlocked account. If your account is missing unlocks, the pools differ and results can be off. Load your save to personalize.
  • Ancients in acts 2 and 3. Their offers read your live deck, so the tool reports a base case and flags it as indicative. Neow and the act-1 ancient are exact.
  • Niche RNG streams. A handful of rare Neow options (and similar) resolve on side streams the predictor does not yet simulate; those are labeled rather than resolved.

Single-player is assumed throughout. Multiplayer changes room counts and some pools.

Report an inaccuracy or suggestion

Found a prediction that didn't match your game, or have an idea? Send it here. Nothing is sent until you hit Submit.