Arboreal Hammer

Transmutation
Level: Druid * 4, Hunter * 4
Components: V, S, DF
Casting Time: 1 Standard Action
Range: medium (100 ft. + 10 ft./level)
Target: one Huge or larger tree
Duration: 1 round/level (D)
Saving Throw: None
Spell Resistance: no
  This spell animates a tree's branch and directs it against your foes. At Caster Level 10th or lower, you can target a Huge tree. At Caster Level 11th-15th, you can target a Gargantuan tree, and at Caster Level 16th or higher you can target a Colossal tree. The animated branch makes slam attacks with a Strength score equal to 10 + your Caster Level. The branch strikes once per round with an attack bonus equal to your Caster Level + the branch's Strength modifier, adjusted by the appropriate Size Modifier (-2 for Huge, -4 for Gargantuan, -8 for Colossal). A Huge tree's slam deals 2d6 points of damage, a Gargantuan tree's slam deals 3d6 points of damage, and a Colossal tree's slam deals 4d6 points of damage; the tree adds 1-1/2 times its Strength modifier to this damage. A Huge tree has reach 15 feet, a Gargantuan has reach 20 feet, and a Colossal has reach 30 feet. The tree attacks the creature you designate when you cast the spell, and is unable to move. You can direct the tree against a new target as a Move Action. The tree does not gain a bonus for Flanking, nor can it help another combatant flank. It cannot attack a foe you cannot see.