Jinn

Knows everything

won't tell the future and only answers 3 questions every 100 years, she had 2 remaining of the century.

looks

tall, has voluptuous and curvaceous body despite bring thousands of years old, bright blue skin, wears only gold chains on her wrist, ankles, and waist, dark blue hair and eyes.

How she is summoned

She is summoned from the relic of knowledge by saying her name.