Ichor Sticker

Ichor Stickers are Hardmode enemies that spawn in the Underground Crimson. They can be seen floating around. When tracking a player, they spit Ichor at them, which can lower your defense by 20 points. Upon death, they will drop Ichor. They are immune to the Poisoned and Venom debuffs.

Tips

 * To easily farm Ichor it is recommended the player to create shafts in the Underground Crimson for the Ichor Sticker to spawn. A three block tall shaft will get the Ichor Sticker stuck and barely able to shoot the player (they shoot in an arc), with a four block tall they became mobile but still have problems shooting the player.

bugs
occasionally I have found this, along with Herpling, spawn in hardmode underworld in a corrupted world created in 1.1.2