Archetype: Elemental Hunter

Another go on the theme "lightning animal companion" for my kid: this is a variant of the Divine Hunter that I already had published on the Paizo boards.

Elemental Hunter

Some hunters are bound to the Planes of Power and draw their strength from the primary elements of the universe.

Class Skills: An elemental hunter gains Knowledge (planes) as a class skill, but she does not gain Knowledge (geography) as a class skill.

Domain: At 3rd level, an elemental hunter learns to call upon the power of the elements. The elemental hunter must select one domain from the following list: Air, Earth, Fire, Plane of Air, Plane of Earth, Plane of Fire, Plane of Water, Water, Weather. She gains the granted powers of this domain, using her hunter level – 2 as her cleric level for determining when the powers are gained and what effects they have. Once she chooses this domain, it cannot be changed.
In addition, the elemental hunter adds the 1st-level domain spell from her domain to her list of spells known. She adds the 2nd-level domain spell at 6th level, the 3rd-level domain spell at 9th level, the 4th-level domain spell at 12th level, the 5th-level domain spell at 15th level, and the 6th-level domain spell at 18th level.
This ability replaces teamwork feats.

Elemental Companion (Su): At 3rd level, a hunter’s companion takes on elemental features. The animal companion gains the aerial, aqueous, chthonic, or fiery template; once this choice is made, the template cannot be changed. The companion's CR is considered to be equal to its Hit Dice for the purpose of the template. This ability replaces hunter tactics.

Elemental Focus (Ex): At 8th level, the elemental hunter gains Planar Focus as a bonus feat. This ability replaces second animal focus.