Cthulhu Sanity Loss Comparison (Max Values)
Compare Call of Cthulhu monster sanity loss max from hybrids 4 to Shub-Niggurath 100. Uses Chaosium 7e bestiary rows. Includes full tables with sources and FAQ.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Deep One Hybrid Lowest here. Use base 4. | 4 sanity | 0 slash 1D4 to see hybrid | Chaosium Wiki Mythos Monsters: Sanity Loss 0 slash 1D4 to see deep one hybrid |
| Ghoul Ties 6 tier. | 6 sanity | 0 slash 1D6 to see ghoul | Chaosium Roll20 Ghoul Free Basic Rules: sanity loss 0 slash 1D6, Wiki 0 slash 1D6 |
| Deep One Ties 6 tier. | 6 sanity | 0 slash 1D6 to see deep one | Chaosium Roll20 Deep One 0 slash 1d6, Harvest booklet 0 slash 1D6 encounter |
| Mi-Go soldier spy base Ties 6 tier. | 6 sanity | 0 slash 1D6 to see mi-go | Chaosium Harvest booklet: Sanity Loss 0 slash 1D6 encounter mi-go and spy, Wiki same |
| Rat-Thing base Base 6 used. Known variant noted. | 6 sanity | 0 slash 1D6, 1 slash 1D8 if known in life | Chaosium Wiki: Sanity Loss 0 slash 1D6 rat-thing, 1 slash 1D8 if known |
| Byakhee Ties 6 tier. | 6 sanity | 1 slash 1D6 to see byakhee | Chaosium Roll20 Byakhee 1 slash 1d6, Wiki 1 slash 1D6 |
| Ghast Beats 6 tier by 2. | 8 sanity | 0 slash 1D8 to see ghast | Chaosium Wiki: Sanity Loss 0 slash 1D8 to see ghast |
| Dark Young of Shub First double digit here. | 10 sanity | 1D3 slash 1D10 | Chaosium Harvest booklet: Sanity Loss 1D3 slash 1D10 dark young, Wiki same |
| Formless Spawn Ties Dark Young. | 10 sanity | 1 slash 1D10 | Chaosium Wiki: Sanity Loss 1 slash 1D10 formless spawn |
| Hunting Horror Ties 10 tier. | 10 sanity | 0 slash 1D10 | Chaosium Wiki: Sanity Points 0 slash 1D10 hunting horror |
| Shoggoth Beats 10 tier by 10. | 20 sanity | 1D6 slash 1D20 | Chaosium Roll20 Shoggoth 1D6 slash 1D20, Wiki same |
| Star-Spawn of Cthulhu Ties Shoggoth. Smaller than Cthulhu. | 20 sanity | 1D6 slash 1D20 satraps | Chaosium Wiki: Sanity Loss 1D6 slash 1D20 star-spawn |
| Shub-Niggurath Outer God Largest here. 100 tier anchor. | 100 sanity | 1D10 slash 1D100 | Chaosium Harvest booklet: Sanity loss 1D10 slash 1D100 encounter Shub-Niggurath |
About this converter
Keeper sanity rows list paired dice as fail versus success loss with max sorting here. Deep One Hybrid tops at 4 from 0 over 1D4. Ghoul, Deep One, Mi-Go, Rat-Thing and Byakhee top at 6 from 0 or 1 over 1D6, with Rat-Thing rising to 8 if known in life. Ghast tops at 8 from 0 over 1D8. Dark Young, Formless Spawn and Hunting Horror top at 10 from 1D3 or 0 to 1 over 1D10. Shoggoth and Star-Spawn top at 20 from 1D6 over 1D20. Shub-Niggurath tops at 100 from 1D10 over 1D100. Great Cthulhu at the same 100 tier lacks a fetched official page in this pass and stays out with Shub covering 100.
How to use it
Pick two entries and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try Shub-Niggurath against Ghoul to see the 100 to 6 god gap. The result line prints the equality plus the per unit ratio. Click a table row to load that entry as Entry A with amount 1. Values here are max of each pair.
Minimums ride in context per row since only max sorts. Rat-Thing known in life variant at 8 is noted but base 6 sorts. Success versus fail order follows book slash pairs. Omitted: spell casting sanity costs, which use a separate spell table.
FAQ
What is lowest loss?
Deep One Hybrid at max 4 from 0 over 1D4. Ghoul tier at 6 follows.
What is Shoggoth loss?
Max 20 from 1D6 over 1D20. Star-Spawn ties at 20.
What tops here?
Shub-Niggurath at max 100 from 1D10 over 1D100. Great Cthulhu same tier stays out uncited.
Are minimums included?
In context only, like Ghoul 0 and Byakhee 1. Max values sort the table.
Sources
- Chaosium Call of Cthulhu RPG Wiki Mythos Monsters bestiary: Sanity Loss slash rows 0 slash 1D4 through 1D10 slash 1D100
- Chaosium A Time to Harvest Keeper Reference Booklet CHA23176 Sanity Loss lines for Deep One, Mi-Go, Dark Young and Shub rows
- Roll20 Compendium Ghoul, Byakhee, Deep One and Shoggoth Free Basic Rules sanity loss rows cross check
Last verified: 2026-10-05 · 13 entries
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