Cycloid Feather

 is a feather.

Obtaining

 * Dropped by
 * Cycloid

Uses

 * Used in the craft of
 * Age-Old Helmet
 * Bubotron Amulet
 * Creaking Tree Hat
 * Cycloid Amulet
 * Flinty Daggers
 * Hot Docs
 * Sinistrofu Boots