The piercer is for those dungeons for which the darkmantle is just too new-school. This version varies a bit from the CC version and the version in the Tome of Horrors. If there's another version somewhere, plz point me the way!
PIERCER
This cave arthropod resembles a hermit crab with a sharp, conical, stoney carapace ranging from two feet long to six feet long in the largest specimens.
ECOLOGY
Environment Underground
Organization Solitary or colony (3-18)
SPECIAL ABILITIES
Piercing (Ex): Once per ambush, piercers can drop on unsuspecting creatures and deal extra slam damage with a successful attack. Piercing deals double slam damage with no Strength bonus or penalty.
TINY PIERCER CR 1/6
XP 65
N Tiny vermin
Init +1; Senses darkvision 60 ft., Perception +3
DEFENSE
AC 18, touch 13, flat-footed 17; (+1 Dex, +2 size, +5 natural)
hp 4 (1d8)
Fort +2, Ref +1, Will +0
OFFENSE
Spd 10 ft., climb 10 ft.
Melee slam -2 (1d3-2)
Space 2 1/2 ft.; Reach 0 ft.
Special Attacks piercing (2d3)
STATISTICS
Str 6, Dex 12, Con 11, Int —, Wis 10, Cha 9
Base Atk +0; CMB -4; CMD 7
Feats Skill Focus (Perception)
Skills Climb +9, Stealth(1) +13, Perception +3; Racial Modifiers +8 Climb, +8 Stealth in natural caverns
SMALL PIERCER CR 1/4
XP 100
N Small vermin
Init +0; Senses darkvision 60 ft., Perception +7
DEFENSE
AC 16, touch 11, flat-footed 16; (+1 size, +5 natural)
hp 9 (2d8)
Fort +3, Ref +0, Will +0
OFFENSE
Spd 10 ft., climb 10 ft.
Melee slam +0 (1d4-1)
Space 2 1/2 ft.; Reach 0 ft.
Special Attacks piercing (2d4)
STATISTICS
Str 9, Dex 10, Con 11, Int —, Wis 10,
Base Atk +1; CMB -1; CMD 9
Feats Skill Focus (Perception)
Skills Climb +9, Stealth(1) +13, Perception(1) +7; Racial Modifiers +8 Climb, +8 Stealth in natural caverns
ELDER PIERCER CR 1
XP 400
N Medium vermin
Init -1; Senses darkvision 60 ft., Perception +7
DEFENSE
AC 16, touch 9, flat-footed 16; (-1 Dex, +7 natural)
hp 22 (4d8+4)
Fort +5, Ref +0, Will +1
OFFENSE
Spd 10 ft., climb 10 ft.
Melee slam +4 (1d6+1)
Space 5 ft.; Reach 5 ft.
Special Attacks piercing (2d6)
STATISTICS
Str 12, Dex 8, Con 12, Int —, Wis 10, Cha 9
Base Atk +3; CMB +4; CMD 13
Feats Skill Focus (Perception), Skill Focus (Stealth)
Skills Climb +9, Stealth(3) +15, Perception(1) +7; Racial Modifiers +8 Climb, +8 Stealth in natural caverns
A piercer is a troglobitic arthropod with a shell that resembles a daggerlike stalactite. Similarly to cave fishers and Arachnocampa luminosa, they attack prey from cave ceilings, but rather than angling for prey, they dive-bomb it. Piercers conceal themselves among natural stalactites and drop on passing creatures, attempting to pierce them. Then they swarm over injured prey, battering it with their elongated shell like a club.