The Voidist is a flying enemy found in Pishon Dry Lake. It attacks by firing a piercing Void projectile towards the player every few seconds.
A Voidist.
The Void projectile is similar to the one fired by the Champion. It travels slower than the Champion's, but still pierces terrain and is usually fired at an angle based on the Voidist's position. Counter it by dashing through it once you've acquired 
Pallas' Void Bell, as it's trickier if not impossible to dodge it through typical evasion.
Uniquely, the Voidist's projectiles are blocked by the regenerating green platforms present in Pishon Dry Lake, but pass normally through all other terrain.
There are 2 tougher versions of the Voidist called the Nulltist and the Cosmotist.