Killsound packages allow you to customize the global sound played when you kill another player! Equip them by using /killsound in game.

The Duelist package includes:

Anvil Drop (Uncommon)
Anvil Shatters (Uncommon)
Bone Snap (Uncommon)
Critical (Uncommon)
Grindstone (Uncommon)
Shatter (Uncommon)
Shield Breaks (Uncommon)
Sweep (Uncommon)
Thorns (Uncommon)