Velvet Worm, Giant (CR 5)

Huge Vermin
Alignment: Always neutral
Initiative: +0; Senses: darkvision 60 ft., tremorsense, Listen +4, and Spot +4

AC: 13 (-2 size, +5 natural), touch 8, flat-footed 13
Hit Dice: 10d8+30 (75 hp)
Fort +10, Ref +3, Will +3
Speed: 20 ft., climb 10 ft.
Space: 15 ft./10 ft.
Base Attack +7; Grapple +21
Attack: Bite +11 melee (1d8+9 plus poison) or glue strand +5 ranged touch (entangle)
Full Attack: Bite +11 melee (1d8+9 plus poison) or 2 glue strands +5 ranged touch (entangle)
Special Attacks/Actions: Glue strand, poison
Abilities: Str 22, Dex 11, Con 16, Int -, Wis 11, Cha 2
Special Qualities: vermin traits
Feats: -
Skills: Climb +14, Listen +4, and Spot +4
Advancement: 11-20 HD (Huge); 21-30 HD (Gargantuan)
Climate/Terrain: Warm marshes
Organization: Solitary
Treasure/Possessions: None

Source: Lost Empires of Faerûn

The giant velvet worm is too slow to catch most prey, so it traps its victims with strands of glue and then closes in to devour its victims.

Glue Strand (Ex): A giant velvet worm can shoot a stream of quick-drying glue up to 100 feet. Any creature struck by a glue strand is entangled for 2d4 rounds and must make a DC 18 Reflex save or be stuck to the ground, unable to move. Even on a successful save, it can move at only half speed. A winged flying creature is not stuck to the ground, but it must make.a DC 15 Reflex save or fall to the ground and be stuck there by the glue.

A creature stuck to the ground by the giant velvet worm's glue can break free with a successful DC 18 Strength check, or y dealing 10 points of damage to the strand with a slashing weapon. A creature trying to scrape glue off itself, or a creature assisting another creature to do so, need riot make an attack roll; hitting the glue is automatic. For each hit, the attacking creature makes a damage roll. Once free, however, the creature is still entangled until the glue wears off.

The velvet worm often continues to throw glue strands onto creatures that are already stuck in order to prevent escape. Each additional strand that hits the target increases the DC of the Strength check to break free by 2 and adds 10 hit points to the gluey mass and 2 rounds to the duration of the victim's entanglement.

Poison (Ex): Bite, Fortitude DC 18, initial and secondary damage 1d4 Con. The save DC is Constitution-based. Tremorsense (Ex): A giant velvet worm can locate any creature within 60 feet that is in contact with the ground.

Skills: A giant velvet worm has a +4 racial bonus on Listen and Spot checks.

The giant velvet worm is an enormous version of an invertebrate similar to a caterpillar. It shoots sticky strands of quick-hardening glue from its large, mobile antennae to immobilize its prey. A giant velvet worm is about 30 feet long and weighs roughly 8,000 pounds.