Otherworldly Stone

Otherworldly Stone is a craftable post-Moon Lord block crafted from Armored Shells, Dark Plasma, Twisting Nether, Stone Blocks and Silk. It requires a pickaxe of at least 200% pickaxe power to mine.

Trivia

 * Otherworldly Stone is internally referred to as "Occult Stone", and all of the furniture it crafts are also internally named "Occult".