Complex sentence: Lancer makes an example by donning a mask, pretending to be a ghost, unfortunately Jack mistakes him for one and uses the Fenton Ghost Peeler, shaving him down to nothing but his undergarments.
Split into simpler sentences: Lancer makes an example by donning a mask, pretending to be a ghost. Unfortunately, Jack mistakes him for one and uses the Fenton Ghost Peeler, shaving him down to nothing but his undergarments.