Flashbomb

The Flashbomb was an experimental explosive device created by Leonardo da Vinci. Lighting it up would see the spark make it way down the string before causing a small explosion.

History
Leo used the Flashbomb in the Medici Palace whilst trying to get his Notebook back from Piero de' Medici. With Mac's help, he lit the Flashbomb and rolled it out outside Piero's study, the explosion causing Piero and Valerio to come out and see. However, Piero quickly realized it had been meant to get them out of the room. (Bandit Queen)