Six gruesome blades forged from dwarven blood in the pits of ancient bol-Pakash. Six knives the dwarves wish never existed.
Maddoc sat amid a pile of unrecognizable corpses. Men, Dwarves, Orcs, you couldn't tell. He periodically took a stab at one with his new knife and screamed, "STOP LAUGHING AT ME!"
A dark dagger of song, forged for vengance. It shall have that vengance.
A dagger that makes the user think that he is invisible.
Actually a real-world fungus, just heard about it. A fungus that tastes well and all, no ill effects. UNLESS you consume some beverage, even 3 (three) days after eating it. Then you become really sick, pains, vomiting, all the fancy stuff. Was really used to cure alcoholism. May be a joke or to make sure the heroes spend their time focused on the mission.