From Queen Anne's Revenge
Ultra rare0.1%ObjectiveOptionalMulti-player
Playing as Blackbeard, perform an acrobatic kill and a pistol kill in less than 10 seconds.
Playing as Blackbeard, land an acrobatic kill and a pistol kill within 10 seconds of each other. Pick Blackbeard, do an acrobatic (ledge/leap) kill then immediately a pistol kill inside the window. Its platform-twin Queen Anne’s Revenge wants a gun kill instead - same idea.