Mastery of a Minor Domain

Divine Domain class feature

You worship a deity that has dominion over more than one divine domain, and have access to spells that fall within your god's extended portfolio. Choose a Divine Domain other than the one you already possess, and gain the spells for that domain as an additional domain spell list. For each spell level that you can cast, you always have two domain spells prepared, that do not count against the number of spells you can prepare each day: you can choose these two spells from either of your domain spells lists.