The Grimoire is a minigame in cookie clicker unlocked by getting your wizard towers to at least level 1 using a sugar lump. Sugar lumps are unlocked at 1 billion cookies baked.
If you don't have the Grimoire unlocked, you aren't ready to use this tool.

A screenshot of the Grimoire minigame.
In the Grimoire, you cast spells from a selection of 9 different spells to boost your production in various ways. Casting spells cost magic, which regenerates over time.
Each spell also has a small chance to "backfire" when casted, producing a different set of "unintended" effects that are sometimes negative.
This tool is primarily concerned with the second spell in the list, called Force the Hand of Fate (FtHoF for short).


Description for Force the Hand of Fate.

The probabilities of getting each of the various golden cookie effects are different from the probabilities of naturally spawned golden cookies.


The modified effect probabilities of various effects from FtHoF. Notably, Click frenzy (777x click power) is much more common than normal.

The Grimoire has many random elements. Force the Hand of Fate (shorthand: FtHoF) in particular, as seen above, can give many different effects at different probabilities.
One particular property of the Grimoire is that its random elements cannot be rerolled. This is called "seeded random". To see what I mean, do the following:
1. Make a backup of your current game using the Export save button in options.
2. Cast Force the Hand of Fate (FtHoF).
3. Click the golden/wrath cookie that spawns, and note down its effect. (also note down where it spawned)
4. Import the backup you made to go back to before you casted the spell.
5. Go back to step 2 as many times as needed. You will see that you will always get the same effect from that golden/wrath cookie, it will either stay golden or stay wrath, and it will always spawn at the same place, no matter how many times you do it.

This is because randomness in the Grimoire is based on a hidden "game seed" and the amount of spells you have ever casted in the Grimoire. The game seed only changes when you ascend, while the spell casted number increments by 1 for each spell you cast. You can see how many you have casted below the magic bar.

The important number is second one, after "total:"
If neither of those changes, the same spell will always give the same outcome.

Because the randomness only depends on those two things, this tool extracts the hidden game seed from your save file, and uses that to produce predictions about what you will get next from FtHoF (you should know what this means by now) by reverse engineering the game's code.
The table at the bottom of the website contains your future predictions. You can hover over each effect to see what it means. A wrath cookie indicates backfiring, while a golden cookie indicates success. Note: these predictions are only 100% valid without any backfire chance modifiers; things such as on-screen unclicked golden/wrath cookies, Diminish Ineptitude (spell), and Supreme intellect (aura) modify backfire chance.
If you do have any backfire chance modifiers, you can use the "Set backfire modifiers" button to input any modifiers that you may have.
Tip: because outcomes only depend on the game seed and the cast count, you can skip undesirable effects by casting a non-FtHoF, cheaper spell, saving magic regeneration time.

Some parts of the table will include some abbrevations, and this is also useful for reading more advanced parts of this guide.
(For example, effects with an abbrevation wrapped in brackets after it indicates useful effects that are normally inaccessible, which you can hover over to view more information.)

Below are some useful abbrevations and terms to know for this tool. You don't have to memorize them; you can refer back to this page when needed.

More lingo: click here

The Gambler's Dream column indicates what spell Gambler's Fever Dream (GFD) will choose to cast.



This is useful because spells casted through GFD are cheaper.
If a GFD would cast FtHoF, hovering over the cell would display what that FtHoF will cast. This is usually the outcomes on the row below it.
Despite what the effect description says, GFD actually raises the backfire chance to a minimum of 50% instead of doubling it.
Note: GFD is still a spell, so casting it will cause it to progress to the next outcome.
Also note: This column is valid IF and only if all spells are castable by GFD. A spell is not castable if you don't have enough magic for GFD to cast it, even with the halved magic cost. The minimum amount of magic you need for it to be valid is 22/22 magic.
You can see a more accurate version according to your magic counts by inputting them into the planner through the "Configure magic counts" button just above the table.

The Random seeds column displays a hidden number associated with each row of outcomes that, due to the peculiar way the game is programmed, dictates both backfiring and GFD outcome. Beside the number you can see how many on-screen golden/wrath cookies it takes for the cast to backfire. (each one adds +15% to backfire chance)
Knowledgeable players also use this information to determine GFD transmutations.
GFD transmutation: GFD can be coerced into casting something that it would not normally cast, by adjusting magic count and max magic count such that a specific subset of spells are castable by GFD.

The Combo finder can be accessed through the "Open Combo finder" button.

A combo is a cluster of close-by Building Specials (BSs). Click frenzies (CFs) are ignored because they are extremely common and one can be assumed to exist near any combo that you find.
The combo finder finds those in the seed/save inputted. Note: the combo finder is mainly useful with advanced strategies such as quadcasting and with at least 600 wizard towers.

Combo finder settings
Min combo: the minimum amount of BSs to find.
Max combo: the maximum amount of BSs to find.
Max spread: dictates how close together the rows with BS must be. Each point of spread is one spell in the sequence that can be non-BS and cannot be skipped for free. For example, if you want a 3x combo and are ok with a sequence of [BS, non-BS, BS, BS], that would be a combo size of 3 with a spread of 1, for a total length of 4.
Include Elder frenzies: Elder Frenzies (666x cps for a very short time) also counts as a BS.
Skip abomination: Rows without a useful effect like BS but with Gambler's Fever Dream (GFD) casting Resurrect Abomination does not contribute to its spread (spread from Max spread setting). This is because on such a row, if you cast GFD while the grandmapocalypse is NOT ongoing, you will go to the next row for free.
Skip spontaneous edifices: Rows without a useful effect like BS but with Gambler's Fever Dream (GFD) casting Spontaneous Edifice successfully does not contribute to its spread (spread from Max spread setting). Same story as Skip abomination, because on such a row, if you cast GFD while you have at least 400 of every building, you will go to the next row for free.

Routing resources
Routing is the act of taking a potential combo and figuring out a way to turn this potential combo into a real combo with a series of executable steps. This is only applicable for very late game (800+ towers) and you need to perform combos with 2+ effects from the Grimoire to progress.
Grimoire calculator: a tool to figure out spell costs and tower counts quickly. Requires some advanced knowledge of the Grimoire to use.
Finnless Grimoire guide: a late-game guide containing information on how to find and route a combo, including information on how to use the Grimoire calculator above.
You can also go to the Official Cookie clicker Discord server to ask for help routing a combo.

Finnless destroyer
Finnless destroyer is a mod developed by @xyntercept on discord, integrated into this planner.
It is a very advanced tool for top finnless players to be able to find extremely large combos (10+ effects) quickly.

Highlight settings can be accessed through the "Show/hide Highlight settings" button.

In the planner, some noteworthy outcomes (such as BS and EF) are highlighted to make them easier to spot.
You can modify what outcomes are considered noteworthy, change their colors, or add new highlights.

Advanced mode can be toggled through the top-right button.
Advanced mode allows you to add filtering logic to your highlights. For example, it can detect consecutive BSes, by making a BS outcome only highlight blue if there is a BS in the row above it.
Information about the syntax can be through the "Advanced help" button.