Face of Metamind
The last boss: a huge face with two eyes, a nose and a mouth of gems, each part with its own health. It is the ninth of the nine bosses.
Welcome to the Metamind. No exits.
The fight
Face of Metamind is a large face drawn over a faint skull. It is made of parts: two eyes, a nose, and a row of gems along its mouth. Each part has its own health, and several are protected by a shield of their own, so the fight is about taking the face apart piece by piece rather than damaging one bar.
It attacks with drones and with shots from different parts of the face.
Tips
Pick a part and finish it. Taking the face apart one piece at a time is a clearer way to make progress than spreading your shots across all of it.