Another stunted breed of mimic, this particular strain nevertheless has a large appetite. To deal with this, its ancestors played with various forms before settling on a stocking. Not only does prey sometimes slip it on their legs, they also hang it on their chimneys during part of the year. This makes it easier to take their place. Along with a distended stomach to swallow larger prey, these monstrosities also developed the arcane ability to shrink meals. Think of them as fuzzy, warm, snakes.

Stocking Mimic

Small monstrosity (shapechanger), neutral

Armor Class 11 (natural armor)

Hit Points 27 (6d6 + 6)

Speed 15 ft

Str 15 Dex 10 Con 12 Int 5 Wis 14 Cha 10

Skills Stealth +4

Damage Immunities acid

Condition Immunities prone

Sensesdarkvision 60 ft, passive Perception 12

Languages -

Challenge 1 (200 XP)

Shapechanger.

The mimic can use its action to polymorph into a stocking or back into its true, amorphous form. Its statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.

Adhesive (Object Form Only).

The mimic adheres to anything that touches it. A Large or smaller creature adhered to the mimic is also grappled by it (escape DC 12). Ability checks made to escape this grapple have disadvantage.

False Appearance (Object Form Only).

While the mimic remains motionless, it is indistinguishable from an ordinary stocking.

Grappler.

The mimic has advantage on attack rolls against any creature grappled by it.

Actions

Bite.

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) piercing damage plus 4 (1d8) acid damage.

Swallow.

The mimic makes one bite Attack against a Small or smaller target it is Grappling. If the Attack hits, the target is swallowed, and the grapple ends. The swallowed target is Blinded and Restrained, it has total cover against Attacks and other Effects outside the toad, and it takes 7 (2d6) acid damage at the start of each of the mimic's turns. The mimic can have only one target swallowed at a time.

If the mimic dies, a swallowed creature is no longer Restrained by it and can Escape from the corpse using 5 feet of Movement, exiting prone.

It'll Fit.

The mimic cause a creature or an object it can see within 30ft to grow smaller for the duration. Choose either a creature or an object that is neither worn nor carried. If the target is unwilling, it can make a DC 12 Constitution saving throw. On a success, the spell has no effect.

The target's size is halved in all dimensions, and its weight is reduced to one-eighth of normal. This reduction decreases its size by one category - from Medium to Small, for example. Until the spell ends, the target also has disadvantage on Strength checks and Strength saving throws. The target's weapons also shrink to match its new size. While these weapons are reduced, the target's attacks with them deal 1d4 less damage (this can't reduce the damage below 1).