Thoughtseize

You touch a creature, pouring energies through its mind and tearing an answer from its head. Make a melee spell attack against a creature. On a hit, the target takes 2d8 psychic damage, and has disadvantage on Intelligence, Wisdom and Charisma checks or saving throws until the end of your next turn.

Additionally, you can learn the answer to a single question that you extract from the creature. The answer appears immediately in your head as a “yes”, “no”, or “unsure”. A creature only provides information that it believes, not necessarily an accurate answer. If the question asked does not have a yes or no answer, the spell instead returns “complex”.