Had this idea the other day whilst planting a sapling. Earthworms generally have an icky connotation, but any horticulturist will tell you they're absolutely essential for maintaining healthy soil. I had the idea of a earthworm deity, some ancient pagan god worshiped by farmers during tough growing years. Given the common association of worms and ickiness, the Church (pick your favorite) would certainly have banned the cultus of the worm god centuries before, but he/she/it continues to be worshipped in secret, the rites carried on by old country wisemen and shamans. Turning to the worm god would be a last resort and seen as a form of witchcraft, but farmers desparate to save their crops would seek out the god's diviners. The rituals and rites associated with it are weird (in the classical sense), though not evil or wicked; enough to make one raise an eyebrow and feel a chill.
So! What thoughts have you on the worm god? Suggestions for tales, rituals, priesthood, etc.?
(BTW, "Cuiteog" is merely the Irish Gaelic word for earthworm, a placeholder for whatever name is settled [though I like it as a possibility])