Nature's Champion

Those who seek to protect nature from its enemies, Nature’s Champions use every means necessary to complete their mission.

Hunter's Purge

Instead the Nature’s Champion can use Purge as a Crusader of their level, and use Agility in place of Luck. The enemy the Nature’s Champion uses Hunter’s Purge on must be an enemy that is either actively harming nature, or wishing harm against the Nature’s Champion and thus wishing to harm a protector of nature. If the Nature’s Champion initiated the combat first against an otherwise peaceful being, they cannot use their Hunter’s Purge on them.

This replaces Hunting Specialization.

Spellcasting

This functions as a Chaplain’s Spellcasting (for MP), except that the Nature’s Champion gains Nature spells, and they only receive 2 + ½ Magic spells to start with. At every level they’d normally receive an increase to Eagle Eye’s range, they instead gain a new spell of a level they can cast.

This replaces Eagle Eye.