Brass Contraption

The Brass Contraption is an enemy introduced in Risk of Rain 2. They are floating bell-like entities comprised of two circular metal pieces that surround a small bell. Their main form of attach is to summon three spiky metal balls above them, and then launch then towards the player. Both the summoning and launching let out a telltale sound, making them pretty easy to avoid.

Currently, their corpses have a weird collision issue which is most noticeable when Mercenaries swing their swords through them. This causes a loud sound-glitch.

Trivia

 * Bronze, or brass is a common material used in musical instruments and church bells, made from copper and tin. The variant used in bells is much harder and more fragile than the one used to make weaponry.