A spear that reflects the life of it’s owner trough small Haiku like poems. As the soldier lives his life the spear casts a shadow of his great exploits. Small runes are carefully etched in the ash shaft after a great battle or another important event in the warriors life.
The party is walking through the forest at night when they come upon a clearing. Half a dozen black-robed corpses lie scattered across the ground, and a pentagram of blood is shoddily drawn in the dirt.
It seems these people summoned something they could not control. Whether or not the demon returns is up to the GM, but it would be just as rich if the demon never returned, and for the rest of the night, every stray sound or odd shadow will be jumped at!