these tools are : -the mortal instruments , by which we may know truth , speak with angels , and make more of our own kind -the country of idris , in which we may live safely away from both demons and the mundane world -the book of raziel ( or `` gray book '' ) , with which we may make use of the magic of angels to protect and augment ourselves these were gifts given by raziel to the first nephilim , jonathan shadowhunter , and so after him we call ourselves shadowhunters .