Ectoplasm

Dropped from Dungeon Spirits, which rarely escape from Blue Armored Bones, Necromancers, and Skeletons within the hardmode Dungeon.

Creates:

Ghost Wings

Spectre Hood

Spectre Robe

Spectre Pants

Spectre Picaxe

Spectre Hamaxe

Spectre Paintbrush

Spectre Paint Roller

Spectre Paint Scraper