Chromatic Slime

Amorphous. The slime can move through a space as narrow as 1 inch wide without squeezing.

Morph. The slime can morph and appear as any object within it's size range. For example, a Tiny slime can appear as a coin or book, or a Large slime can appear as a wagon or statue. This can last until the slime chooses to either morph into a different form or morph into its true form.

Spider Climb. The slime can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Pseudopod. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage plus 7 (2d6) acid damage.

Adhesive. The slime can adhere to an object or person. If the slime sticks to flesh or fabric on flesh, the target must make a DC 13 Constitution saving throw or take 6 (1d6+1) acid damage, half on a success. This doesn't happen if the slime adheres to metal armor or whatever the target is holding, but the slime can use its movement to make it's way onto open flesh.

The target can use an action to remove the slime. Note: it doesn't work if the victim attempts to remove it with their bare hands. Water or magic works best.

Split. When a slime that is Medium or larger is subjected to lightning or slashing damage, it splits into two new slimes if it has at least 10 hit points. Each new slime has hit points equal to half the original slime's, rounded down. New slimes are one size smaller than the original slime.

Disguise. At 10 hit points or less, the slime can attempt to escape and morph into an object within it's size range. Anyone who searches for the slime must succeed on a DC 16 Perception or Investigation check to spot it.