Shapechange

This power is very similar to the Druid's shapechanging power, not to the ninth-level wizard spell. The power can be used three times per day; it is the DM's decision whether the priest can change into three different types of animal, each once per day, or only into one specific type of animal three times per day. This power, though it would seem to be most appropriate to priests of gods of nature, is actually appropriate for any priesthood... if the god in question has an animal symbol or totem. For instance, if the god of the sky has as his symbol the eagle, it's appropriate for his priests to have this power and turn into an eagle three times per day.

Druid Shapechange

At 7th level he gains the ability to shapechange into a reptile, bird, or mammal up to three times per day.

Each animal form (reptile, bird, or mammal) can be used only once per day.

The size can vary from that of a bullfrog or small bird to as large as a black bear.

Upon assuming a new form, the druid heals 10-60% (d6 × 10%) of all damage he has suffered (round fractions down).

The druid can only assume the form of a normal (real world) animal in its normal proportions, but by doing so he takes on all of that creature's characteristics - its movement rate and abilities, its Armor Class, number of attacks, and damage per attack.

The druid's clothing and one item held in each hand also become part of the new body; these reappear when the druid resumes his normal shape. The items cannot be used while the druid is in animal form.