"Killer petal" is a title based upon conjecture.
Check the behind the scenes section, the revision history and discussion page for additional comments on this article's title.
In 2016, a "killer petal" floated through a crack in time and found its way to Earth.
Upon feasting on the blood of its first victim, the petal was able to multiply, thus creating more petals. At first, it only fed on birds and squirrels. The new petals would go on to find more victims, enabling them to multiply thousands of times in the space of just one day. (TV: Co-Owner of a Lonely Heart)