Dragon, Brainstealer Wyrm (CR 23)

Gargantuan Dragon (Earth)
Alignment: Always lawful evil
Initiative: +1; Senses: blindsense 300 ft., darkvision 1000 ft., and low-light vision
Languages: Telepathy 100 ft.

AC: 42 (-4 size, +36 natural), touch 6, flat-footed 42
Hit Dice: 37d12+333 (573 hp)
Fort +29, Ref +21, Will +29
Speed: 40 ft., fly 150 ft. (clumsy)
Space: 40 ft./15 ft.
Base Attack +37; Grapple +63
Attack: 1 bite +47, 2 claws +42, 2 wings +42, 1 tail slap +42, 1 crush +42, 1 tail sweep +42
Damage: 1 bite 4d6+14, 2 claws 2d8+7, 2 wings 2d6, 1 tail slap 2d8, 1 crush 4d6, 1 tail sweep 2d6
Special Attacks/Actions: Mind Blast 1d4+11 (38)
Abilities: Str 39, Dex 12, Con 29, Int 29, Wis 28, Cha 30
Special Qualities: Extract, immunity to acid and mind blast, improved grab, suggestion, telepathy, levitate, charm monster, detect thoughts, astral projection, CL 13th, SR 33, Frightful Presence (DC 38)
Feats: #Feats: 13
Skills: Skill points: 339
Advancement: 38-39 HD (Gargantuan)
Climate/Terrain: Underground
Organization: Solitary (1 dragon, any age), clutch (1d4+1 wyrmlings, very young, young, juvenile, or young adults), family (pair of mature adults and 1d4+1 offspring)
Treasure/Possessions: Triple Standard

Source: Dragon #337

Extract (Ex): A brainstealer dragon that maintains a hold with a tentacle for 5 consecutive rounds extracts the opponent's brain, instantly killing that creature. This power is useless against constructs, elementals, oozes, plants, and undead. It is not instantly fatal to foes with multiple heads, such as ettins and hydras.

Improved Grab (Ex): To use this ability, a brainstealer dragon must hit a creature up to one size category larger than itself with a tentacle attack. It can then attempt to start a grapple as a free action without provoking attacks of opportunity. If it wins the grapple check, it establishes a hold and begins to extract the opponent's brain. A successful grapple check each round furthers the extraction process and deals automatic tentacle damage. A brainstealer dragon can hold one creature in each tentacle, but it cannot grapple an opponent with more than one tentacle. An opponent can escape with a single successful grapple check or an Escape Artist check.

Mind Blast (Sp): This psionic attack is a cone with a length appropriate for the dragon's size (as breath weapon). Anyone caught in the cone must succeed on a Will save or be stunned for 1d4 rounds plus the dragon's age category. The save DC is Charisma-based. Once the dragon uses this ability, it cannot use it again for 1d4 rounds.

Psionics (Sp): 3/day - suggestion, levitate, charm monster, detect thoughts, astral projection.

Telepathy (Su): Brainstealer dragons can communicate telepathically with any creature that has a language within 100 feet.

Skills: Bluff, Gather Information, and Survival are considered class skills for brainstealer dragons, in addition to the standard class skills for dragons.

Earth Subtype

This subtype usually is used for elementals and outsiders with a connection to the Elemental Plane of Earth. Earth creatures usually have burrow speeds, and most earth creatures can burrow through solid rock.