He will give OSRS Items you his promised 2k plusd another 30 for boat fares. Go back to port sarim, and make your way over into the wizard tower. Speak to wizard mizgog and he'll tell you father uhrney said you're coming. He will give you"wrapped Package. Duplicates cost 7.5k. Bring the package safely to the priest, who will be waiting for you at the church. He will then ask you that god you support; Guthix, Saradomin, or Zamorak.
However, if you say yes, he'll tell you to move into town and get black priest robes (top and bottom, found in clothes stores) a green cape (guthix), cape of winners (blue cape, champions guild) or crimson cape (Zamorak, clothing store) and a staff of air(Saradomin) water (guthix) or fire (Zamorak), that may be found in Zaff's Staff store. Bring these goodies back to the priest and he will bless them in the name of this god of your choice.
He will return them and you'll get (by way of example, Saradomin) Saradomin priest gown top and bottom, Saradomin priest cape, and saradomin priest staff. He'll also give you a prayer publication of your own god. (The priest robes and team along with cape will alter appearance to match.)
Prayers from prayerbooks choose the place of a spellbook or even the default spells. These prayers aren't actually prayers, and don't remove prayer points, but do not give prayer or magic xp when cast. All these"prayers" are such as the lumbridge home port, so they all have recharge occasions. Each god cheap RS gold has another prayer book.