Eberron Cursed Rabbit's Foot
This is a small rabbit’s foot. It is mildly cursed, the owner will not willingly give it away and will seek to reclaim it if it is stolen.
If the owner rubs the rabbit’s foot as a bonus action, flip a coin. If it’s heads, the owner gets advantage on the next roll. If it’s tails, the owner gets disadvantage on the next roll.
The owner does not know until the roll is made.