Briarvex (CR 6)

Large Plant
Alignment: Ususually neutral evil
Initiative: +0(Dex); Senses: low-light vision and Spot +7
Languages: Common, Sylvan

AC: 19 (-1 size, +0 Dex, +10 natural), touch 9, flat-footed 19
Hit Dice: 8d8+32 (68 hp); DR: 5/slashing
Fort +10, Ref +2, Will +5
Speed: 30 ft.
Space: 10 ft.; Reach 10 ft.
Base Attack +6; Grapple +17
Attack: Melee: 2 spiked fists +12 each (2d6+7 plus thorn burrow)
Special Attacks/Actions: entangle
Attack Options: Power Attack, thorn burrow
Abilities: Str 25, Dex 10, Con 19, Int 11, Wis 12, Cha 11
Special Abilities: Immunities: plant immunities; Weakness: vulnerability to fire
Special Qualities: Plant traits
Feats: Improved Natural Attack (spiked fist), Iron Will, Power Attack,
Skills: Hide +1* Listen +7, Spot +7, and Survival +6 (*A briarvex has a +16 racial bonus on Hide checks made in forested areas.)
Advancement: 9-12 HD (Large); 13-25 HD (Huge) or by character class; Favored Class: druid
Climate/Terrain: Dark forest
Organization: Solitary or stand (2-4)
Treasure/Possessions: Standard (mostly gems and coins)

Source: Monster Manual IV

Improved Woodland Stride (Ex): A briarvex can move through any sort of undergrowth (such as natural thorns, briars, overgrown areas, and similar terrain) at its normal speed and without taking damage or suffering any other impairment. In addition, thorns, briars, and overgrown areas that have been magically manipulated do not impede its motion or otherwise affect it.

Thorn Burrow (Su): A briarvex's spiked fist attack deals piercing as well as bludgeoning damage.

Each time a briarvex hits with its spiked fist, thorns break off and bore into the struck opponent. As a swift action, the briarvex can cause embedded thorns to twist and burrow into a single creature's flesh, dealing 3d6 points of piercing damage; damage reduction applies. The target of this ability must be within 100 feet of the briarvex. The briarvex must also have line of effect to the target. A creature can remove the thorns with a standard action.

Entangle (Su): As the Entangle spell; at will; DC 18; caster level 8th.

This ability affects a 60-foot-radius area around the briarvex and lasts for 1 round. The save DC is Constitution-based.