It seems we're missing 4th, 6th, and 8th level vestiges.
Also, about the Lama: Mission Accomplished.
Let me try to (hurriedly) create a 4th level vestige.
Spoiler: The King in Yellow
The King in Yellow
Lord of Carcosa
Sign: The Yellow Sign appears, as if tattooed, on your brow.
Languages: You are proficient in Abberant while bound to The King in Yellow.
Pallid Mask:Once per short rest as an action, you can don the Pallid Mask, a mask so powerful that all enemies within 30 feet must succeed at a Wisdom saving throw or be frightened for 1d6 rounds.
Touch of Carcosa: You gain a natural attack that you are proficient with that deals 1d10 psychic and necrotic damage, plus an additional number determined by your level. The extra damage is 7 at 7th level, 10 at 10th level, 15 at 15th level, and 20 at 20th level. For each 5 damage done by the attack, you gain 1 temporary hitpoint.
Yellow Sign: As an action, once per short rest you can cause burst of yellow light to come forth from the Yellow Sign on your brow, forcing all enemies within 30 feet to succeed at a Wisdom saving throw or be stunned for 1 round.