Cimim

The Cimim actually has a pocket universe inside of it. When in mirror form, they may pull people through the mirror into the pocket universe.

Grab. Melee Weapon Attack: +0 to hit, reach 10ft., 1 target. As an action, the Cimim may attempt to reach out and grab a creature within ten feet of it. A tendril extends from the mirror and makes a grapple check. If they fail, nothing happens. If they succeed, the creature it grabbed must make a CON save with DC 12. If they fail, theyre sucked in. If they succeed, they are grappled by the Cimim, but remain on the Prime Material Plane.

Seeing Double. As a bonus action, the Cimim can produce up to five Mirrored-Facsimiles of its enemies either in the pocket dimension or regular plane. (It can choose to split them between the pocket and prime.) For each creature it manifests, it loses 5hp.

• The stats for the Facsimiles: 
• Same initiative as Cimim, but when they're active, the Cimim can not make attacks.
• As a bonus action, it may dismiss the Facisimiles and regain the 5hp for each one successfully returned.
• AC 10, HP 10
• Melee attacks only (fist, shortsword, grapple)
• +0 to all modifiers
• Successful unarmed strike = 2 force damage
• Successful shortsword attack = 1d4 force damage
• For each Facsimile successfully killed, the Cimim loses 10hp.

If an enemy is inside the pocket dimension and they attack the Facsimiles, the Facsimiles have resistances to all attacks, but otherwise function like the Facsimiles on the outside.

For each round inside the Cimim, a creature would take 5 psychic damage.

Pocket Picker. As a reaction, if a creature touches the Cimim with a non-magical weapon, the creature must make a CON save of DC 12 or be sucked into the pocket dimension inside the Cimim.