Whip Scorpion, Giant (CR 2)

Large Vermin
Alignment: Always neutral
Initiative: +1 (Dex); Senses: darkvision 60 ft. and Spot +4

AC: 18 (-1 size, +1 Dex, +8 natural), touch 10, flat-footed 17
Hit Dice: 4d8+8 (26 hp)
Fort +6, Ref +2, Will +1
Speed: 10 ft.
Space: 10 ft./5 ft.
Base Attack +3; Grapple +9
Attack: Claw +4 melee
Full Attack: 2 claws +4 melee and bite -1 melee
Damage: Claw 1d6+2, bite 1d8+1
Special Attacks/Actions: Improved grab, squeeze, poison spray
Abilities: Str 15, Dex 12, Con 14, Int -, Wis 10, Cha 2
Special Qualities: immunity to poison, vermin traits
Feats: -
Skills: Climb +6, Hide +1, and Spot +4
Advancement: 5-12 HD (Large)
Climate/Terrain: Any land and underground
Organization: Solitary or pair
Treasure: None

Source: Lost Empires of Faerûn

About the size of an ogre, this spider has a long, flat body and six spindly legs. Two more legs held close to the creature's mouth end in spiny pincers. Two long, whiplike appendages emerge from its body just behind its pincer-legs, and a third stretches up from the rear of its abdomen.

A giant whip scorpion measures between 8 and 12 feet long and weighs about 500 pounds. It is sometimes called a monstrous uropygid, or occasionally a giant vinegaroon because of its acidic spray.