Welcome @DeathsAssociate It is a rule of this forum for all new members to properly introduce themselves so PLEASE CLICK ON THE IMAGE BELOW and tell us about yourself and any experience you may have in magick, such as what you practice, how long you have practiced, areas of interest, etc:
PS: While there are plenty of gods of death and skeletal figures in most cultures, there is no such thing as the “Grim Reaper.” That modern concept came into being in 14th Century Europe during the ravages of bubonic plague aka The Black Death. “Reaper” as a job description is a creation of modern role-playing games. However, since the chaos magick paradigm proved magicians can work with anything provided their belief in it is strong enough, look into the book Liber Falxifer, current 218, and the Qayin tradition.