Ant Lion, Giant
This gigantic armored creature looks like an ant with an oversized abdomen. A set of long, hooked mandibles protrudes from the front of its broad, flat head.
CR: 5 XP: 1,600
N Large vermin
Init: +0 Senses: darkvision, tremorsense 60 ft. Perception: +0
Defense
AC: 19, touch 9, flat-footed 19, (+10 natural, –1 size)
hp: 60 (8d8+24)
Fort: +9 Ref: +2 Will: +2
Immune: mind-affecting effects
Offense
Speed: 30 ft., burrow 10 ft.
Melee: bite +10 (2d8+7 plus grab)
Space: 10 ft. Reach: 5 ft.
Special Attacks: sand trap
Statistics
Str: 20 Dex: 11 Con: 17 Int: — Wis: 11 Cha: 10
Base Atk: +6 CMB: +12 (+16 grapple) CMD: 22
Ecology
Environment: warm deserts
Organization: solitary or nest (2–4)
Treasure: Value 1, 550 gp
Description
Sand Trap (Ex) A giant ant lion can create a 60-foot-diameter trap in any sand or soft earth surface (see below). Creating a sand trap takes 1 hour. A giant ant lion can make an attack of opportunity against any creature that falls to the bottom of its sand trap. These creatures can move across sand traps at their normal speed and are immune to these traps effects. A frightening menace for those traveling through the desert, giant ant lions prey upon nearly anything smaller than them. They create giant sand traps for lairs, which resemble little more than broad depressions in the sand. Anyone that steps into such a depression must act fast or quickly slide down to the bottom, where one of these ravenous insectile predators typically lies in wait.
Ant Lion Sand Trap CR — Type mechanical; Perception DC 15; Disable Device — Effects Trigger location; Reset manual Effect 20-ft.-deep, 60-ft.-diameter sand trap (creatures slide to the bottom and take no damage); DC 15 Reflex avoids; climbing out of the sand trap requires a DC 20 Climb check.
Ant Lion, Mature
Source: Bonus Bestiary