Selenian

The Selenian is a Hardmode, post-Lunatic Cultist enemy that is spawned by the Solar Pillar during the Lunar Events. It is a ground based enemy that wields two flaming swords. It can curl up and fly towards the player at high speed. When it does so, certain projectiles you have fired at it will be reflected. This is very dangerous as some weapons like the Sniper Rifle and Meowmere can potentially deal over 300 damage to the player.

It can reflect Bullets, Arrows and Darts, but not Rockets. It additionally reflects the following:

Trivia

 * The word selenian means "lunar" and refers to Selene, the Roman goddess of the moon and sister of the sun-god Helios.