Caustic Staff

The Caustic Staff is a craftable Hardmode summon weapon. When used, it summons a black Caustic Dragon minion that flies behind the player and attacks nearby enemies by firing gravity-affected thorns that pierce through tiles and up to two enemies. While the player is holding a summon weapon or tool, the thorns will cycle through and inflict one of the following debuffs for 1-3 seconds in this repeating order:
 * Marked
 * Ichor
 * Venom
 * Cursed Inferno
 * On Fire!