Warbound Impaler (Battlebriar, Lesser) (CR 7)

Large Plant
Alignment: Usually neutral
Initiative: -2 (Dex); Senses: darkvision 60 ft. and low-light vision

AC: 19 (-1 size, -2 Dex, +12 natural), touch 7, flat-footed 19
Hit Dice: 12d8+72 (126 hp)
Fort +14, Ref +2, Will +4
Speed: 30 ft.
Space: 10 ft./5 ft.
Base Attack +9; Grapple +19
Attack: Slam +14 melee
Full Attack: 2 slams +14 melee
Damage: Slam 1d8+6/19-20
Special Attacks/Actions: Impale, improved grab, thorn volley, trample 1d8+9
Abilities: Str 23, Dex 6, Con 22, Int 5, Wis 10, Cha 7
Special Qualities: plant traits, resistance to electricity 10 and fire 10, thorn field
Feats: Cleave; Improved Bull Rush; Improved Critical (slam); Improved Natural Attack (slam); Power Attack
Skills: Hide +11*
Advancement: -
Climate/Terrain: Temperate forests
Organization: Solitary
Treasure/Possessions: None

Source: Monster Manual III

Trample (Ex): Reflex DC 22 half. The save DC is Strength-based.

Thorn Volley (Ex): A warbound impaler's thorns deal 5d6 points of piercing damage to all creatures within the area (Reflex DC 22 half). The save DC is Strength-based.

Lesser battlebriars approach combat just like their larger counterparts.

Smaller than the more powerful battlebriars that roam the wild, warbound impalers are at least somewhat obedient and are often encountered in the service of another creature. Skilled handlers can influence these creatures enough to keep them docile much of the time, and even send them into battle when necessary. Many believe that the warbound impalers were actually the original battlebriars and that the larger, more powerful battlebriars are in fact warbound impalers gone feral. This thinking belies the notion that warbound impalers are somehow lesser versions of their untamed kin. A lesser battlebriar averages around 8 feet long and weighs between 1 and 2 tons.