Mimic (CR 4)

Large Aberration (Shapechanger)
Alignment: Usually neutral
Initiative: +1 (Dex); Senses: darkvision 60 ft., Listen +8, and Spot +8
Languages: Common

AC: 15 (-1 size, +1 Dex, +5 natural), touch 10, flat-footed 15
Hit Dice: 7d8+21 (52 hp)
Fort +5, Ref +5, Will +6
Speed: 10 ft.
Space: 10 ft./10 ft.
Base Attack +5; Grapple +13
Attack: Slam +9 melee
Full Attack: 2 slams +9 melee
Damage: Slam 1d8+4
Special Attacks/Actions: Adhesive, crush
Abilities: Str 19, Dex 12, Con 17, Int 10, Wis 13, Cha 10
Special Qualities: mimic shape, acid immunity
Feats: Alertness; Lightning Reflexes; Weapon Focus (slam)
Skills: Climb +9, Disguise +13, Listen +8, and Spot +8
Advancement: 8-10 HD (Large); 11-21 HD (Huge)
Climate/Terrain: Any underground
Organization: Solitary
Treasure/Possessions: 1/10th coins; 50% goods; 50% items

Source: Monster Manual

Adhesive (Ex): A mimic exudes a thick slime that acts as a powerful adhesive, holding fast any creatures or items touching 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 mimic makes one automatic slam attack each round against any creature stuck to it.

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

Strong alcohol dissolves the adhesive. A pint of wine or a similar liquid weakens it, but the mimic still has a +4 bonus to grapple checks. A mimic can dissolve its adhesive at will, and the substance breaks down 5 rounds after the creature dies.

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 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.

A mimic often surprises the unsuspecting adventurer, lashing out with a heavy pseudopod. Mimics are smart enough to avoid fights to the death by extorting treasure or food from a party.

Shapechanger Subtype

A shapechanger has the supernatural ability to assume one or more alternate forms. Many magical effects allow some kind of shape shifting, and not every creature that can change shapes has the shapechanger subtype.

Traits: A shapechanger possesses the following traits (unless otherwise noted in a creature's entry).