Spooky , a genuine ford coil pack is around £90 . You can get them from places like GSF etc for a LOT less ..we offer customers the choice ( I work in a Ford workshop and have been there for a LONG time)
Grab a torch and shine it around the coil pack , you can tell when they’re buggered as they tend to crack along the body when they arc internally .
Don’t leave it too long misfiring like that as it will eventually need a catalytic converter if you do !