A merchant and spell trainer in the Church of the Goddess in Trademond.
Open Domain I: Available for training for free during the Demonic Vault quest. Requires a minimum 20 mana. Training ends the day and takes up the next day.
Shadowcloak I: Available for training after completing Festival of Greed. Requires a minimum 40 mana and costs 3500 gold (note that the skill can be acquired much more cheaply from the Dark Mage). Training ends the day and takes up the next day.