Quickdeath was a male NightWing who was introduced in Darkstalker. He was an assassin hired by Vigilance to murder Darkstalker, but failed and was killed by Lionfish. He resided in the lost city of night.
Quickdeath had iron-tipped claws.
When Darkstalker, Clearsight, Fathom, Listener, Whiteout, and Thoughtful attended the annual NightWing Jubilee Festival, Quickdeath snuck up on them and tried to assassinate Darkstalker by plunging a spear into his heart. This failed because of Darkstalker's invulnerable scales, and Quickdeath was then immediately killed by Lionfish, trying to protect Fathom from harm.