Supernatural events are one of the elements of tragedy.
There are two in the very beginning. The first is the Feast of Lupercal, which is believed to encourage women to conceive, should they be touched during a ritual running through the streets. Both Antony and Ceaser seem to believe this will work. However, the more obvious example is Calpurnia's dream, which prefigures Caesar's death. Whereas she is a terribly frightened woman (probably partly due to having so domineering a husband) who puts great stock in the omen, he blows it off, showing his extreme arrogance and belief that he can control his own destiny.
black magic
