The plagueseeds are powerful daggers that The Cohesive had intended on equipping his experiments with before sending them out to fight for The Empty Lord. After Cohesive had gone insane, the Plagueseeds seemingly played an instrumental role in the Cohesive's plot to destroy all life on Gielinor. However, he was killed before he could dispatch any units with the weapons. They are highly infectious, and over a prolonged stationary period appear to be able to infect the very land and air around them with disease. Chamber, the Infected explorer, Plagueborn, and Gore elementals have a chance to drop a Plagueseed. It can disease player targets in PvP and poisons NPCs.