Liveoak

This spell enables the caster to charm a healthy oak tree (or other type if the DM allows) to cause it to serve as a protector. The spell can be cast on a single tree at a time. While a liveoak spell cast by a particular caster is in effect, he cannot cast another such spell. The tree upon which the spell is cast must be within 10 feet of the caster's dwelling place, within a place sacred to the caster, or within 100 yards of something that the caster wishes to guard or protect.
The liveoak spell can be cast upon a healthy tree of small, medium, or large size, according to desire and availability. A triggering phrase of up to a maximum of one word per level of the spellcaster is then placed upon the targeted oak; for instance, "Attack any persons who come near without first saying 'sacred mistletoe'" is an 11- word trigger phrase that could be used by a caster of 11th level or higher casting the spell. The liveoak spell triggers the tree into animating as a treant of equivalent size, an Armor Class of 0 and with two attacks per round, but with only a 30-foot-per-round movement rate.

Tree Size	Height	Hit Dice	Damage per Attack
Small	12'-14'	7-8	2d8
Medium	16'-19'	9-10	3d6
Large	20'-23'+	11-12	4d6

A tree enchanted by this spell radiates a magical aura, if checked for, and can be returned to normal by a successful casting of a dispel magic spell, or upon the desire of the caster who enchanted it. If dispelled, the tree takes root immediately. If released by the caster, it tries to return to its original location before taking root. Damage to the tree can be healed with a plant growth spell, which restores 3d4 points of damage. A plant growth spell used in this fashion does not increase the size or hit points of the liveoak beyond the original value.

Sphere: Charm, Plant
(Enchantment)
Level: 6

Range: Touch
Components: V, S, M
Duration: 1 day/level
Casting Time: 1 turn
Area of Effect: 1 oak tree
Saving Throw: None

Material Components:
the priest's holy symbol