Wisp
Wisps are Light Elemental mobs from Lycanites Mobs that are considered friendly protectors of light.
Spawning
Wisps spawn in direct sunlight during the day, and only in the Overworld. They spawn in groups of 1 to 2.
Summoning
If the player has a Knowledge Rank of at least 2 of the Aegis and Cinder, they can be summoned as temporary allied minions with a Summoning Staff. The two minions can then fuse into a Wisp if they are close enough together. They can not be tamed, only temporarily summoned.
variants
For every Wisp that spawns, there is a 10% chance for it to be an Uncommon variants. Uncommon Wisps can be Azure or Violet. An Azure Wisp is light blue in color, while a Violet Wisp is light pink. Uncommon Wisps have double the Health of a regular Wisp.
Behavior
Wisps are friendly, helpful entities which will help in various ways. They inflict the Glowing and Night Vision effects on nearby players, and will ignite nearby undead enemies. When angered, they will throw a Light Ball at targets, inflicting the Glowing effect.
Wisps will also throw Light Balls to nearby Wisps, effectively playing a game of catch with them. However, these Light Balls do still have hitboxes, and can kill an unarmored player if they accidentally walk into one and get headshot. Regardless, the Light Balls are relatively slow and easy to dodge, so while a small amount of caution should be exercised around groups of Wisps, they are otherwise friendly and good to keep around.
Fusion
If a wild Aegis and Cinder fuse, they can form a Lvl 20 Wisp. If the Aegis and Cinder are both Uncommon, the resulting Wisp will also be Uncommon.
Also, it is important to note that a Lvl 20 Wisp can instantly kill a player, even with full iron armor. Best to keep on their good side, and if you don't, remember to keep moving.