Mimic 5e Guide: Adhesive, Fair Clues, and a Storeroom Mystery

Rules baseline: 2014 D&D 5e, SRD 5.1. Use the mimic stat block in the SRD, page 333 for complete statistics. The clues, feeding response, layout, and morale below are original DM suggestions.

A mimic works best when it changes how the party investigates one room. Make that room worth understanding: an inventory, signs of recent movement, and an objective that does not require opening the suspicious chest. Players who make a sensible deduction should be able to act on it.

What to emphasize

The standard mimic is CR 2. In object form, its False Appearance makes it indistinguishable from an ordinary object while motionless. A high Perception check should not simply reveal teeth that are not exposed. Instead, give clues in the surrounding scene: a missing item, a disturbed patch of dust, or a tool stuck where it should have fallen.

Adhesive works in object form. It sticks to things that touch it, and an adhered creature of Huge size or smaller is grappled, with escape DC 13 and disadvantage on checks to escape that grapple. A grapple sets speed to zero; it does not automatically impose the restrained condition. Its Grappler trait gives the mimic advantage against a creature it grapples.

The pseudopod attack also applies Adhesive in object form when it hits. Use the printed bite and pseudopod options rather than granting a free bite whenever someone touches the chest. The monster has no Multiattack. Review grappling if a character becomes stuck.

Clues that preserve the disguise

Use a contradiction the players can test. The storeroom inventory describes only shelving and dispatch tubes, yet a chest sits in the middle of the floor. Its outline is clean while surrounding stones are dusty. Neither clue identifies a mimic by itself; together, they reward caution.

A probing pole can stick to the mimic without gluing the person at the far end to it. The creature and the tool are separate objects in the situation. Do not invent a contagious adhesive effect that travels along equipment or jumps between rescuers. A character may let go of a stuck object.

Decide how the mimic reacts to testing. Here, a gentle probe stays stuck, while a damaging attack causes it to move and reveal the threat. If someone attacks or the creature lunges, roll initiative before resolving combat actions. Use the normal surprise procedure for characters who have or have not recognized a danger.

Ready to run: the extra chest

Situation: the party needs a bronze dispatch tube from a ruined waystation. A mimic has settled in its storeroom as an extra chest. The dispatch tube is on a shelf, not inside the creature.

Layout: a 30-foot-square room has a southern doorway, shelves on the west wall, and the tube on a northern shelf. The mimic occupies the center. A 10-foot-wide route around its western side lets travelers reach the tube while staying more than 5 feet from the chest. The doorway remains open.

Opening: a surviving inventory sheet outside lists three shelves and six dispatch tubes, with no chest. From the threshold the party sees a broken probing pole stuck to the chest and a clean rectangle beneath it. The mimic remains motionless; describe the evidence without declaring its nature.

Choices: careful travelers can retrieve the tube along the western route. In this scene, the mimic waits for direct contact instead of attacking distant passersby. Leaving a sack of fresh meat within reach also keeps it occupied while the party passes, provided nobody strikes it. This feeding response is a scenario choice, not a printed feature or evidence that the creature speaks Common.

If combat begins: roll initiative and apply the mimic’s real attacks and object-form traits. A character who touches it becomes subject to Adhesive; a character who only holds a stuck pole can release the pole. State whether the creature stays in object form. It retreats toward the empty eastern corner when reduced to half its hit points and does not pursue beyond the waystation in this encounter.

Finish: the tube contains the requested dispatch regardless of what happens to the mimic. A party that avoids contact can complete the job without combat. Removing the creature makes the room safer for later travelers; leaving it behind creates a problem the party can warn the next expedition about.

Prepare for your party

Check the encounter balancing guide before using a CR 2 grappler against low-level adventurers. Easier: provide a fresh, obvious warning from a previous visitor. Harder: put the tube on a high shelf that takes time or equipment to reach, while keeping the clear route intact. The interactive trap guide offers more ways to make investigation productive. Return to Monster Guides for another creature.