133ef22a_ar___The_Binding_of_Isaac_Wiki_Orbitals_Effect
[Item Icon] File:Pill IT.png [Item Name] Pretty Fly [Effect] 
A Fly will circle the player, killing other flies that touch it and occasionally blocking enemy shots. More than three has no effect. Obtained from the slot machines or a pill effect by the same name. Note: The pill image is generic, any unidentified pill can be a Pretty Fly Pill and will become identified when consumed for the remainder of the current game. See Pills.
Familiar - The Binding of Isaac Wiki
Effect