Stonechild (CR 3)

Medium Outsider (Earth and Extraplanar)
Alignment: Usually neutral good
Initiative: +0; Senses: darkvision 60 ft., Listen +5, and Spot +5

AC: 19 (+4 natural, +5 breastplate), touch 10, flat-footed 19
Hit Dice: 2d8+11 (20 hp)
Fort +7, Ref +3, Will +3
Speed: 30 ft. (20 ft. in breastplate)
Space: 5 ft./5 ft.
Base Attack +2; Grapple +6
Attack: Greatsword +6 melee
Full Attack: Greatsword +6 melee
Damage: Greatsword 2d6+6/19-20
Special Attacks/Actions: Magic stone
Abilities: Str 19, Dex 10, Con 19, Int 12, Wis 11, Cha 8
Special Qualities: immunity to acid and poison
Feats: Blind-fight; Toughness
Skills: +2 on other planes), +4 following tracks on other planes, Appraise +6 (+8 stonework), Climb +5, Craft (stoneworking) +6, Intimidate +4, Knowledge (history) +6, Knowledge (the planes) +6, Listen +5, Search +6, Spot +5, and Survival +0 (+2 following tracks
Advancement: 3-6 HD (Medium)
Climate/Terrain: Underground
Organization: Solitary, crew (2-8 plus 0-3 leaders with 6 HD)
Treasure/Possessions: 50% coins; triple goods, 50% items

Source: Miniatures Handbook

Magic Stone (Sp): Three times per day, a stonechild can use a magic stone effect, as the spell (caster level 3rd).

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.

Extraplanar Subtype

A subtype applied to any creature when it is on a plane other than its native plane. A creature that travels the planes can gain or lose this subtype as it goes from plane to plane. This book assumes that encounters with creatures take place on the Material Plane, and every creature whose native plane is not the Material Plane has the extraplanar subtype (but would not have when on its home plane). An extraplanar creatures usually has a home plane mentioned in its description. These home planes are taken from the Great Wheel cosmology of the D&D game (see Chapter 5 of the Dungeon Master's Guide). If your campaign uses a different cosmology, you will need to assign different home planes to extraplanar creatures.

Creatures not labeled as extraplanar are natives of the Material Plane, and they gain the extraplanar subtype if they leave the Material Plane. No creature has the extraplanar subtype when it is on a transitive plane; the transitive planes in the D&D cosmology are the Astral Plane, the Ethereal Plane, and the Plane of Shadow.