Complex sentence: After some days, Clary speaks with Jace and learns that after being stabbed by the Angel blade, he now has sacred fire inside him; preventing people from touching him, as doing so will result in them being burned.
Split into simpler sentences: After some days, Clary speaks with Jace and learns that after being stabbed by the Angel blade, he now has sacred fire inside him. The sacred fire prevents people from touching him, as doing so will result in them being burned.