What once existed is now shards of reality, floating in the sea of conflict...
The Truth Mage, Veracit, feared to utilize the Observer's Paradox, uncomfortable with their perilous effect on reality.
It's so cute!
Wait, why is it glowing?
A magical pair of glasses once allowed the sharpest of minds to perceive the physical world around him. His cutting insight, throwing light on the darkest of secrets, is now housed within the spectacles.
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!