[ WP ] There are rituals that summon demons . Why are there no rituals that summon angels ?

My Summons Teacher, Crawford, flipped to another page in the Book of Supernatural Beings and How to Summon Them. He stopped at page 629, and began to speak. 
 `` Angels have been banned from summoning ever since the Battle of Wings. The mightiest warriors abused their healing abilities to stay practically immortal. This lead to many dictatorships and the eventual removal of all known spells to summon them, as to prevent anyone attempting to overthrow them. Another cause, while not as serious, is how difficult and tedious it was to summon them. According to old testimonies of the summoning of angels, it could take years to prepare for the ritual and even the slightest mistake failed it. One key step was to cause such a predicament that God sent his angels to Earth from the Heavens to stop it, and for you to trap them in the circle.'' 
 
 Crawford stopped, and shut the book. `` A side effect of summoning an angel was the extreme nagging. Pure beings have been known to give their summoners tinnitus or even drive them to suicide. You ingrates can barely stand my harping nowadays, so just imagine how much you'd have to deal with.'' 
 
 
 

