Abyss Skull

Abyss Skulls are post-Moon Lord enemies that spawn during the Dawn of the Void event. They are orbited by 2 Abyss Skulletes, the number raised to 3 in Expert Mode and 4 in Awakened Mode; the Abyss Skulletes are invincible while orbiting in Awakened Mode. They attack the player by charging at them, stopping their charge once they've passed the player and shortly beginning another charge.