Hi! Apologies for the delay. Chthon would not accompany Wanda to Duplicity; she may notice his absence from her soul if that's something she would be consciously aware of. The darkhold would need to be included in her inventory if you would like her to have it. Please include information on any spells or abilities it would grant her (or others) in the abilities section, written out rather than linked, so that we can evaluate the need for any nerfs.