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enemies that fly across the screen in a wavy up-and-down sine pattern. Shovel Knight can use the Shovel Drop to bounce on them and Specter Knight can dash slash through them. They are commonly found in the Clockwork Tower.
- In the ending of Specter of Torment, Tinker Knight mass produces Sine Daggers at the Clocktower Tower by having an assembly line cut off the handles of swords and attaching rockets to them.