10Changed since 1.4.5.6
Measured by comparing the game's own item data between 1.4.5.6 and 1.4.5.8. See the 1.4.5.7 and 1.4.5.8 notes for what the change was for.
Dropped by
how it handles
It throws tridents fast and flat, and they move quickly enough that leading a target is barely necessary. Each one punches through a small number of enemies, taking a bite out of its damage on every pass, so the second and third bodies in a line take noticeably less than the first. Lined up in a corridor that is fine. Against a single boss the piercing does nothing for you and you pay the same mana either way.
farming it
Red Devils only start appearing in the Underworld once a mechanical boss is down, and they hit hard enough that hunting them on foot is a bad plan. Build a platform, let them come to you, and bring something with reach. The drop is thin enough that you will be there a while regardless.
remix and zenith worlds move it
In those seeds it trades places with the Flower of Fire: the devils stop dropping it entirely and you find it locked away in a Shadow Chest or an Obsidian Lock Box. It gets rebalanced downward to fit the earlier slot, so do not expect the same weapon you remember, but pulling one out of a chest before Hardmode is a real early game magic option.