Universe of Swords/Greatsword of the Cosmos

The Greatsword of the Cosmos is a craftable post-Moon Lord projectile sword with autoswing. It summons a barrage of various-sized meteors to rain from the sky, detonating on impact. The sword can be swung repeatedly to summon an immense amount of meteors, dealing damage in an extremely large area.

It becomes available after defeating the Moon Lord.

Trivia

 * The sword's sprite depicts the Solar System.