Delver	CR 9
Usually N Huge Aberration Init +5; Senses darkvision 60 ft., tremorsense 60 ft.; Listen +20, Spot +20 Languages Terran, Undercommon
AC 24, touch 9, flat-footed 23 (−2 size, +1 Dex, +15 natural) hp 145 (15 HD) Immune acid Fort +12, Ref +6, Will +11
Speed 30 ft., burrow 10 ft. Melee 2 slams +17 (1d6+8 plus 2d6 acid) Space 15 ft.; Reach 10 ft. Base Atk +11; Grp +27 Atk Options Blind-Fight, Power Attack Special Actions stone shape
Abilities Str 27, Dex 13, Con 21, Int 14, Wis 14, Cha 12 Feats Alertness, Blind-Fight, Great Fortitude, Improved Initiative, Power Attack, Toughness Skills Knowledge (dungeoneering) +14, Knowledge (nature) +4, Listen +20, Move Silently +17, Spot +20, Survival +14 (+16 underground) Advancement 16-30 HD (Huge); 31-45 HD (Gargantuan)
Corrosive Slime (Ex) A delver produces a mucuslike slime that contains a highly corrosive substance. The slime is particularly effective against stone. A delver's mere touch deals 2d6 points of acid damage to organic creatures or objects. Against metallic creatures or objects, a delver's slime deals 4d8 points of damage, and against stony creatures (including earth elementals) or objects it deals 8d10 points of damage. A slam attack by a delver leaves a patch of slime that deals 2d6 points of damage on contact and another 2d6 points of damage in each of the next 2 rounds. A large quantity (at least a quart) of water or weak acid, such as vinegar, washes off the slime. An opponent's armor and clothing dissolve and become useless immediately unless the wearer succeeds on a DC 22 Reflex save. Weapons that strike a delver also dissolve immediately unless the wielder succeeds on a DC 22 Reflex save. A creature attacking a delver with natural weapons takes damage from its slime each time an attack hits unless the creature succeeds on a DC 22 Reflex save. These save DCs are Constitution-based. Stone Shape (Ex) A delver can alter its slime to temporarily soften stone instead of dissolving it. Once every 10 minutes, a delver can soften and shape up to 25 cubic feet of stone, as a stone shape spell (caster level 15th).

Delver

CR 9

Usually N Huge Aberration

Init +5; Senses darkvision 60 ft., tremorsense 60 ft.; Listen +20, Spot +20

Languages Terran, Undercommon

AC 24, touch 9, flat-footed 23
(−2 size, +1 Dex, +15 natural)

hp 145 (15 HD)

Immune acid

Fort +12, Ref +6, Will +11

Speed 30 ft., burrow 10 ft.

Melee 2 slams +17 (1d6+8 plus 2d6 acid)

Space 15 ft.; Reach 10 ft.

Base Atk +11; Grp +27

Atk Options Blind-Fight, Power Attack

Special Actions stone shape

Abilities Str 27, Dex 13, Con 21, Int 14, Wis 14, Cha 12

Feats Alertness, Blind-Fight, Great Fortitude, Improved Initiative, Power Attack, Toughness

Skills Knowledge (dungeoneering) +14, Knowledge (nature) +4, Listen +20, Move Silently +17, Spot +20, Survival +14 (+16 underground)

Advancement 16-30 HD (Huge); 31-45 HD (Gargantuan)

Corrosive Slime (Ex) A delver produces a mucuslike slime that contains a highly corrosive substance. The slime is particularly effective against stone. A delver's mere touch deals 2d6 points of acid damage to organic creatures or objects. Against metallic creatures or objects, a delver's slime deals 4d8 points of damage, and against stony creatures (including earth elementals) or objects it deals 8d10 points of damage. A slam attack by a delver leaves a patch of slime that deals 2d6 points of damage on contact and another 2d6 points of damage in each of the next 2 rounds. A large quantity (at least a quart) of water or weak acid, such as vinegar, washes off the slime. An opponent's armor and clothing dissolve and become useless immediately unless the wearer succeeds on a DC 22 Reflex save. Weapons that strike a delver also dissolve immediately unless the wielder succeeds on a DC 22 Reflex save. A creature attacking a delver with natural weapons takes damage from its slime each time an attack hits unless the creature succeeds on a DC 22 Reflex save. These save DCs are Constitution-based.

Stone Shape (Ex) A delver can alter its slime to temporarily soften stone instead of dissolving it. Once every 10 minutes, a delver can soften and shape up to 25 cubic feet of stone, as a stone shape spell (caster level 15th).