Questions tagged [call-of-cthulhu-d20]

A version of the Call of Cthulhu system utilizing the d20 system released by Wizards of the Coast in 2001.

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Introduce CoC d20's spell costs into DnD3.x

Call of Cthulhu d20 has a Sanity point loss and/or (temp.) ability drain cost for spellcasting. How would it be best to introduce this system into DnD3.x? Are there (semi-)official guidelines for ...