Gods speak in riddles to mortals, and clerics are the foremost decipherers of these riddles. While most interpret the messages of the gods into holy (and unholy) spells relevant to their domains, some translate them into pure, terrestrial magic.
Beginning at 1st level, a cleric gains one energy spell slot for each level of cleric spell he can cast, from 1st on up. Each day, a cleric can prepare a spell into his energy spell slot with an energy descriptor (acid, cold, electricity, fire, or sonic) from the sorcerer/wizard spell list as though it were on the cleric spell list. A cleric cannot “lose” an energy spell to cast cure or inflict spells spontaneously.
This ability replaces the domains class feature.