Good question.... I looked it up.

The whole plant is poisonous and it is an ingredient in e.g. rat poison. Like many poisonous plants Siberian squill can also be used as a heart medicine if it is administered in the correct dosage. Siberian squill is connected with many beliefs, the oldest of which go back to ancient times: the scientific name of the genus is related to the goddess Scylla of Greek mythology, a beauty who was tuned into a terrible sea monster. The superstitious people long regarded Siberian squill as a flower of witches and evil spirits which shouldn’t even be stepped on. It is doubtful that anybody would feel inclined to trample on this herald of the spring, even though its beauty can be enjoyed without any fear of evil spirits.

Source: https://www.luontoportti.com/suomi/en/kukkakasvit/siberian-squill