Paraelemental, Magma-Huge (CR 7)
AC: 17 (-2 size, -1 Dex, +10 natural), touch 7, flat-footed 17
Hit Dice: 16d8+80 (152 hp); DR: 10/magic
Fort +15, Ref +4, Will +5
Speed: 30 ft.
Space: 5 ft./15 ft.
Base Attack +12; Grapple +16
Attack: Slam +19 melee
Full Attack: Slam +19 melee
Damage: Slam 2d10+13
Special Attacks/Actions: Burn
Abilities: Str 29, Dex 8, Con 21, Int 6, Wis 11, Cha 11
Special Qualities: Elemental, fire subtype
Feats: Cleave; Great Cleave; Improved Bull Rush; Power Attack
Skills: Listen +14 and Spot +14
Advancement: 17-20 HD (Huge)
Climate/Terrain: Any land and underground
Manual of the Planes
Burn (Ex): Those grappled by a magma paraelemental or hit by its slam attack must succeed at a Reflex save (DC 17) or catch fire. The fire burns for 1d4 rounds (see Catching on Fire). A burning creature can take a move-equivalent action to put out the flame.
Creatures hitting a magma paraelemental with natural weapons or unarmed attacks must likewise make a Reflex save to avoid catching fire.
Fire Subtype (Ex): Fire immunity, double damage from cold except on a successful save.
Magma paraelementals love to charge into melee combat. Given a chance, they'll grapple foes smaller than they are.
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.
A creature with the fire subtype has immunity to fire. It has vulnerability to cold, which means it takes half again as much (+50%) damage as normal from cold, regardless of whether a saving throw is allowed, or if the save is a success or failure.