Brass Contraption

The Brass Contraption is an enemy introduced in Risk of Rain 2.

Behavior
The Brass Contraptions are floating bell-like entities comprised of two circular metal pieces that surround a small bell. Their only form of offense is to summon three spiky metal balls above themselves, and then launch them towards the player. Both the summoning and launching let out a telltale sound, making them pretty easy to avoid.

Trivia

 * Brass, an alloy made from copper and zinc, is widely used in musical instruments. However, bells are usually cast from bronze (copper and tin).