Due to the amorphous nature of your true form, you cannot benefit from armor, though you can use a shield. Your Armor Class is equal to 10 + your dexterity modifier.

Your maw is a natural weapon, which you can use to make unarmed strikes. If you hit with it, you deal piercing damage equal to 1d4 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike.

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

You have advantage on grapple checks. In addition, whenever a Large or smaller creature interacts with you or enters a space within 5 feet of you, while you have shape changed into an object, you can use your reaction to attempt to grapple that creature.

As an action, you can polymorph into an object of your Medium or Small size that you have seen, or back into your true form. You can also transform into your Gnome form While you remain motionless, as an object you are indistinguishable from an ordinary object. Your equipment does not change with you, however, it may be contained within you as long as your shape has the dimensions to accommodate it. If you die, you revert to your true form. You retain all of your normal statistics while in this form.

You can speak, read, and understand Common.

Due to the sticky nature of your body, ability checks made to escape your grapple have disadvantage.

Your creature type is both humanoid and monstrosity.

You have advantage on Charisma (Deception) checks when convincing others that you're not actually a mimic.