Dead Rat
Literally a dead rat. Nobody really has much use for dead rats, except maybe Goblins.
Dead rats, were given as a disgusting "treat" in the 2022 Halloween Trick or Treat Event by the Nightmare Imp, though some may consider this more a trick. Wizards, Warriors, Souls, and Friends traveled through the Vampyre Mist to knock on the Imp's door to receive a surprise. Amazingly, many such rats are now kept in the Forgotten Runes Athenaeum.
Rarity
The Nightmare Imp gave out 170 total Dead Rats.