Bending space, you cause a mouth to magically open on an unattended object or unoccupied surface that you can see within range. The mouth remains for the duration or until the two of you are more than 300 feet apart from each other.
No one but you can see the mouth unless you will it to appear to others, and it is intangible and invulnerable. When a Small or larger creature comes within 30 feet of it without first speaking the password that you specify when you cast this spell, the mouth starts yelling a message of 25 words or less loudly in your voice. The mouth has Truesight with a range of 30 feet.
At the start of each of your turns, the mouth bends from where it is attached and attempts to bite one enemy within 5 feet of it. That enemy must succeed on a Dexterity saving throw or take 4d8 Force damage.
On your later turns, you can take a Magic action to move the mouth up to 30 feet.
* - (a silver whistle)