Hush & Whisper

Once per long rest, as an action, on a successful
weapon attack with Hush, you may cast Silence,
centered on the dagger.
Once per long rest, as an action, you may cast
Sending, but only to any creature that has ever
been successfully attacked by Whisper.
Prized by assassins across Faerun, these paired
daggers are softer than silence. When they strike, the
only sound heard is the quiet voice of death.