Mimic click to see monster

Size/Type: Large Aberration (Shapechanger)
Hit Dice: 7d8+21 (52 hp)
Initiative: +1
Speed: 10 ft. (2 squares)
Armor Class: 15 (-1 size, +1 Dex, +5 natural), touch 10, flat-footed 15
Base Attack/Grapple: +5/+13
Attack: Slam +9 melee (1d8+4)
Full Attack: 2 slams +9 melee (1d8+4)
Space/Reach: 10 ft./10 ft.
Special Attacks: Adhesive, crush
Special Qualities: Darkvision 60 ft., immunity to acid, mimic shape
Saves: Fort +5, Ref +5, Will +6
Abilities: Str 19, Dex 12, Con 17, Int 10, Wis 13, Cha 10
Skills: Climb +9, Disguise +13, Listen +8, Spot +8
Feats: Alertness, Lightning Reflexes, Weapon Focus (slam)
Environment: Underground
Organization: Solitary
Challenge Rating: 4
Treasure: 1/10th coins; 50% goods; 50% items
Alignment: Usually neutral
Advancement: 8-10 HD (Large); 11-21 HD (Huge)
Level Adjustment:

A mimic can have almost any dimensions, but usually is not more than 10 feet long. A typical mimic has a volume of 150 cubic feet (5 feet by 5 feet by 6 feet) and weighs about 4,500 pounds.

Mimics speak Common.

Combat

A mimic often surprises an unsuspecting adventurer, lashing out with a heavy pseudopod. The creature does not necessarily fight to the death if it can succeed in extorting treasure or food from a party.

Adhesive (Ex)

A mimic exudes a thick slime that acts as a powerful adhesive, holding fast any creatures or items that touch it. An adhesive-covered mimic automatically grapples any creature it hits with its slam attack. Opponents so grappled cannot get free while the mimic is alive without removing the adhesive first.

A weapon that strikes an adhesive-coated mimic is stuck fast unless the wielder succeeds on a DC 16 Reflex save. A successful DC 16 Strength check is needed to pry it off.

Strong alcohol dissolves the adhesive, but the mimic still can grapple normally. A mimic can dissolve its adhesive at will, and the substance breaks down 5 rounds after the creature dies.

Crush (Ex)

A mimic deals 1d8+4 points of damage with a successful grapple check.

Mimic Shape (Ex)

A mimic can assume the general shape of any object that fills roughly 150 cubic feet (5 feet by 5 feet by 6 feet), such as a massive chest, a stout bed, or a wide door frame. The creature cannot substantially alter its size, though. A mimic’s body is hard and has a rough texture, no matter what appearance it might present. Anyone who examines the mimic can detect the ruse with a successful Spot check opposed by the mimic’s Disguise check. Of course, by this time it is generally far too late.

Skills

A mimic has a +8 racial bonus on Disguise checks.