Dark Tree (CR 7)

Huge Plant
Alignment: Usually neutral evil
Initiative: -1 (Dex)

AC: 20 (-2 size, -1 Dex,+13 natural), touch 7, flat-footed 20
Hit Dice: 10d8+50 (95 hp)
Fort +12, Ref +2, Will +5
Speed: 10 ft.
Space: 15 ft./10 ft. (0 with bite)
Base Attack +7; Grapple +24
Attack: 2 claws +14 melee; or bite +14 melee
Full Attack: 2 claws +14 melee; or bite +14 melee
Damage: Claw 2d4+9; or bite 1d6+13
Special Attacks/Actions: Grab, confusion
Abilities: Str 28, Dex 8, Con 21, Int 5, Wis 10, Cha 7
Special Qualities: Resist fire (15), cold vulnerability
Feats: Cleave; Improved Sunder; Iron Will; Power Attack
Skills: Disguise +11
Advancement: 11-16 HD (Huge); 17-30 HD (Gargantuan)
Climate/Terrain: Warm forest
Organization: Solitary
Treasure: None

Source: Monster Compendium: Monsters of Faerûn

Dark trees drink the blood of humans and other intelligent creatures that wander into their native jungles.

Dark trees resemble cypress trees, but their bark is darker, and little moss grows on them. They have two deep black eyes that are almost impossible to find unless one knows precisely here to look. They superficially resemble treants, but anyone who sees a dark tree can hardly ignore the palpable hatred and evil emanating from it.