(51.7% ± 12.9% chance) At the bottom of your bowl of Lucky Charms, you discover a tiny leprechaun hatchling. That leprechaun must've accidentally left his first born in your cereal!
When eaten, has a 50% chance of producing a leprechaun hatchling.
Having a ten-leaf clover in your inventory does not increase the odds of getting a leprechaun hatchling.
References
This item is nearly identical to the General Mills cereal, Lucky Charms (apart from having live leprechauns in it). "Frosted Lucky Charms, they're magically delicious!"