'Mortis' is from Latin , and means 'dead'. E.g. Rigor mortis. The stiffness a cadaver (dead person) acquires a few hours after dying.
death
Imago Mortis was created in 2009.
Spiritus Mortis was created in 1987.
Luna Mortis was created in 2001.
Luna Mortis ended in 2010.
Saltatio Mortis was created in 2000.
Metus Mortis was created in 2001.
Hibernus Mortis was created in 1995.
He who is 'in articulo mortis' is someone on the point of death.
"Eater" can be expressed as vorator (genitive voratoris), literally "devourer". "Death" is mors, genitive mortis, so the proper translation is Mortis Vorator or Vorator Mortis. The plural is Voratores Mortis.
Do you mean rigor mortis? Weight doesn't matter! Shortly after death, the muscles lose their calcium ion cycle in the muscles and then begin to stiffen.