Noita Wiki

Projectile Orbit Spells
Fireball Orbit
Sawblade Orbit
Orbit Larpa
Nuke Orbit
Plasma Beam Orbit
Modifiers that add orbiting projectiles to a spell. They cut through both terrain and enemies, and only disappear when its host projectile expires or on direct impact with an enemy.

Plasma Beam Orbit is a spell modifier that adds 4 rotating particle beams to an affected spell projectile. The beams have no effect on the terrain, they only do damage to creatures and unlike the other orbits seem to not lose particles when doing damage.