Blightspawned Treant* (CR 9)
Alignment: Always neutral evil
Initiative: -1 (Dex); Senses: Listen +7 and Spot +7
AC: 20 (-2 size, -1 Dex, +13 natural), touch 7, flat-footed 20
Hit Dice: 7d8+42 (73 hp); DR: 10/slashing
Fort +11, Ref +1, Will +6
Speed: 30 ft.
Space: 15 ft./15 ft.
Base Attack +5; Grapple +24
Attack: Slam +14 melee
Full Attack: 2 slams +14 melee
Damage: Slam 2d6+11
Special Attacks/Actions: Animate trees, blight touch, create spawn, double damage against objects, trample
Abilities: Str 33, Dex 8, Con 23, Int 12, Wis 14, Cha 10
Special Qualities: fire vulnerability, plant traits, undead transformation
Feats: Improved Sunder; Iron Will; Power Attack
Skills: Diplomacy +2, Hide -9, Intimidate 4, Knowledge (any one) +6, Listen +7, Sense Motive +7, Spot +7, and Survival +7
Advancement: 8-16 HD (Huge); 17-21 HD (Gargantuan)
Climate/Terrain: Any land
Organization: Gang (2-5)
Tainted by the corruption seeping through the dark Rawlinswood, a blightspawned creature is a perversion of nature. Sustained by the power of decay rotting their black hearts, the blightspawned loathe anything clean and whole. They seek to spread their horrid poison throughout the woodlands of the East at the direction of the Rotting Man, their malevolent creator.
At first, a blightspawned creature's appearance changes little. As time wears on, though, the foul infection it carries begins to destroy its body. Healthy wood and flesh blacken, becoming damp and crumbly. Leaves and hair clot with oozing sores and soon fall out. Sap and blood become oily and black, running from abscesses in the body. The eyes - if the creature had any to begin with - sink in to become black pits, lit by an evil green light. Finally, life deserts the tortured form altogether, leaving behind nothing but a putrescent corpse sustained by the black sorcery of the Rotting Man's blight.
This is a sample creature derived from a Template.