Marvel's Spider-Man: Miles Morales · Gadget upgrade
Holo-Drone: Fatal Exception
Makes the Holo-Drone explode when it deactivates and knock enemies back; the guide marks this as New Game+ content.
How it works
Fatal Exception is listed as a New Game+ Holo-Drone upgrade. Its stated effect is that the drone explodes when it deactivates, knocking enemies back. The guide does not provide a cost, blast size, or knockback range.
Read the supporting references
Check the edition and source version for patch-specific details. Guide methodology.