# Fantasy Grounds \- The Grand Grimoire of Cthulhu Mythos Magic \(CoC7E\)

Summer DB entity ID: e2755161\-9e8f\-4897\-8925\-3f87de70c5e7

Steam App ID: 766310

The Grand Grimoire of Cthulhu Mythos Magic   Over 550 spells of dire consequences, secrets, and unfathomable power\!  Here are gathered spells drawn from over thirty years of Call of Cthulhu supplements and scenarios\. Each spell has been revised for the Call of Cthulhu 7th edition game, including optional Deeper Magic for the most powerful of Mythos sorcerers and monsters, with which to beguile and confound investigators\. Packed full of advice and guidance on diverse matters including spell names, elements of spell casting, magical components, and astronomical considerations\. Plus flawed spells, ley lines, folk magic, and the magic of the Dreamlands\. Use this grimoire as a resource, a play aid, and as inspiration when designing scenarios\. The Grand Grimoire of Cthulhu Mythos Magic is an essential supplement for Keepers of Arcane Lore\.  Authors:   Mike Mason with Matt Sanderson  Cover Artist:   Sam Lamont and Rhys Pugh   Converted by:   Colin Richardson  Requires:  The free Fantasy Grounds virtual tabletop \(VTT\) software and the Call of Cthulhu 7E ruleset  Adapted for Fantasy Grounds by:      Requires:  The free Fantasy Grounds virtual tabletop \(VTT\) software and a one time purchase of the Call of Cthulhu 7E ruleset\. Screenshots may differ from what you see in\-game based on the extension and ruleset you have loaded\.

## Game information

- Type: dlc

- Developer: SmiteWorks USA, LLC

- Publisher: Smiteworks USA, LLC

- Release date: Dec 13, 2017

- Coming soon: false

- Free to play: false

- Parent Steam app: 252690

- Genres: Indie, RPG, Strategy

- Categories: Multi\-player, Online PvP, LAN PvP, Shared/Split Screen PvP, Co\-op, Shared/Split Screen, Cross\-Platform Multiplayer, Downloadable Content, Remote Play Together, Family Sharing

- Platforms: windows, mac

- Website: Not collected

- Screenshots: https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/766310/ss\_083d2e6f3276007f758ef1515ccbaa093d4dda22\.1920x1080\.jpg?t=1782939713, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/766310/ss\_9ec476c5f0a84c2f906fed0bec4960c3da1733dc\.1920x1080\.jpg?t=1782939713, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/766310/ss\_a29c74d71a0c8589054df5d7ac53bcbb49e1b6f7\.1920x1080\.jpg?t=1782939713, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/766310/ss\_be103657635b8b55132f5a0787aae10723d6cd15\.1920x1080\.jpg?t=1782939713, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/766310/ss\_0636a1639b4d36e8412fbdb54cb78d9efd86a4c0\.1920x1080\.jpg?t=1782939713

- Price: 1999 minor units USD; discount 0%

- Price country: US

## Observed metrics

- Current players: Not collected

- Steam review count: 0

- Steam positive reviews: 0

- Steam negative reviews: 0

- Steam positive percentage: Not collected

- Summer DB rating: No native votes

Review filters: \{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}

## Player history

[Seven-day chart data as Markdown](/api/v1/entities/e2755161-9e8f-4897-8925-3f87de70c5e7/player-metrics?days=7&format=markdown) · [JSON](/api/v1/entities/e2755161-9e8f-4897-8925-3f87de70c5e7/player-metrics?days=7)

Chart values are hourly observed maxima. The sampled 24-hour peak and missing intervals carry explicit coverage; history before collection is unknown.

## Sources and freshness

- Catalog membership: store\_catalog

- Catalog observed: 2026\-09\-28T16:58:32\.455488\+00:00

- Details observed: 2026\-09\-23T07:01:30\.958424\+00:00

- Player count observed: Not collected

- Reviews observed: 2026\-09\-23T07:01:31\.976645\+00:00

Full provenance: \{"urls":\{"price":"https://store\.steampowered\.com/app/766310/","catalog":"https://api\.steampowered\.com/IStoreService/GetAppList/v1/","details":"https://store\.steampowered\.com/app/766310/","players":null,"reviews":"https://store\.steampowered\.com/appreviews/766310"\},"price":"2026\-09\-23T07:01:30\.958424\+00:00","source":"steam","catalog":"2026\-09\-28T16:58:32\.455488\+00:00","country":"US","details":"2026\-09\-23T07:01:30\.958424\+00:00","players":null,"reviews":"2026\-09\-23T07:01:31\.976645\+00:00","language":"en","editorial":null,"membership":"store\_catalog","observations":\{"price":"9c816fdf\-15c2\-4010\-b2ed\-0d4d3a379107","catalog":"d5eddcf4\-d6c7\-4d5d\-9f83\-65dc772fd035","details":"f3dda5f6\-cadb\-4f22\-a59b\-0c6bfa4c5ca0","players":null,"reviews":"55a9338b\-fcf6\-41ed\-8042\-effe0d1a43ab"\},"reviewFilters":\{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}\}

Native rating methodology: \{"count":0,"average":null,"entityId":"e2755161\-9e8f\-4897\-8925\-3f87de70c5e7","revision":0,"observedAt":null,"methodology":"arithmetic\-v1","distribution":\[0,0,0,0,0,0,0,0,0,0\]\}

Steam reviews are not Summer DB votes. Missing data is not zero. Player counts are observations, not historical peaks. A supplemental record does not establish that a game was delisted.

[Steam store](https://store.steampowered.com/app/766310/) · [JSON](/api/v1/games/e2755161-9e8f-4897-8925-3f87de70c5e7)