During their travels, the PCs find a strange garden. Perhaps it is in the ruins of an old manor house or alongside a river they are traveling near, far from anything else. It is largely overgrown. Perhaps strangest of all, no matter what time of day it is, it appears to be dusk within it’s crumbling gates. In the middle of the garden is what remains of some sort of stone monument, and in front of that, a single black poppy grows. Gold sap drips down its stem.
If any PC takes it, it’ll live for five days. During that time, candles will extinguish when they enter a room. The brightest fire will only cast dim light. Even at high noon on a sunny day, the character sees as if the world is in shadow.