Return of Reckoning

So I was cleaning my inventory and I deleted the "well mounted skull", which I need to complete "stake ten enemy skulls" of Night of the Murder event. What I can do now? Any help?

Any other quest item can usually be relcaimed from an npc or world location, in the case of an event item I think you're screwed until next year, or maybe if one of the GMs is feeling merciful...

Upon next restart you'll be able to pick a replacement one up from the vendor for some gold.

Well mounted skull is tradeable. You can easily buy it from another players.