Wisp (Thaumcraft 6)

Wisps are hostile aerial mobs added by Thaumcraft 6. It is a floating orb of sentient magic that spawns naturally in the Nether and Magical Forest biomes. It comes in different color variants depending on the aspect it carries; killing it will drop a Vis Crystal of that aspect. Certain aspects such as Aer will remain neutral when approached by the player until attacked, while others such as Perditio will attack the player on sight.

Wisps attack the player by shooting arcing arcane bolts at them.