Bowlyn

Incorporeal Movement. The bowlyn can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object.

Invisibility. The bowlyn is invisible.

Whispering Manipulation. The bowlyn can use its action to cast the suggestion spell (spell save DC 12) on a creature it can see. Once it uses this ability, it can't use it again until it completes a short or long rest.

Eerie Appearance. When visible (or invisible and viewed by someone who can see such things), the bowlyn appears as a gaunt and skeletal sailor. A creature that recognizes the bowlyn as a former shipmate must succeed on a DC 11 Wisdom saving throw or be frightened for 1 minute.

Nauseating Touch. When the bowlyn makes a melee attack against a creature, the target must succeed on a DC 11 Constitution saving throw or be afflicted with nausea. An affected creature suffers a -2 penalty to attack rolls, saving throws, and ability checks until it is magically healed.

Touch. Melee Weapon Attack: +2 to hit, reach 5 ft., one creature. Hit: 5 (1d6 + 2) necrotic damage.

Accidental Manipulation. The bowlyn can manipulate objects and minor hazards within its vicinity. It can use its action to create a minor accident or mishap, such as loosening a rope, causing damage to a navigational instrument, or other similar effects.

Frightful Moan (Recharge 5-6). The bowlyn emits a terrifying moan audible within 120 feet of it. Each creature within 30 feet of the bowlyn that hears the moan must succeed on a DC 12 Wisdom saving throw or be frightened for 1 minute. A frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.