The arcanist can expend 1 point from her arcane reservoir as a swift action to temporarily prepare a domain spell for a number of rounds equal to her Charisma modifier (minimum 1). While prepared, the spell is considered to be on the arcanist’s spell list. The spell must come from the domain chosen with the theurge exploit. The arcanist must possess the theurge exploit before selecting this greater exploit.
Book of Magic: 10 Arcanist Exploits, © 2016, Jon Brazer Enterprises