Prismatic Lacewing

The Prismatic Lacewing is a rare flying Critter that resembles a butterfly and spawns in the Surface Hallow at from dusk until midnight after Plantera has been defeated. Killing it summons the Empress of Light boss.

The Prismatic Lacewing can be caught with a Bug Net, and be used to craft a Prismatic Lacewing Jar. Releasing it from the inventory and then killing it will still summon the Empress of Light. Care must be taken not to release this outside of the hallow or it will immediately despawn. Only one Lacewing can be naturally spawned at a time.

It is one of the few enemies that can be detected by the Lifeform Analyzer.

It is insanely rare to find in the current patch even with the x10 spawn rate of journey mode. It could take many, many nights for one to appear. Contrary to popular rumours, it does NOT require high winds to spawn. Wind does not seem to affect rarity and/or spawn rates at all.

Tips

 * Collect any Prismatic Lacewings you happen to find via the Bug Net, so that you can farm the Empress of Light when ready.
 * Keep the Guide to Critter Companionship with you so you may farm the Hallow without having to worry about you or a minion/summon accidentally killing it.