...are you being legitimately serious?
You're trying to _actually say_ that Terry Pratchett is the only person who can make Death?
This is nothing like Terry Pratchett.
Terry Pratchett is a satirical writer with a pretty solid original version of Death known for his love of cats, his SEPARATION FROM HIS GRANDDAUGHTER (Mort being his adopted "son", so actually, this is different), and speaking in leaden tones of a tomb being closed, represented by speaking in all caps, SORT OF LIKE THIS.
This is just a textured triangle with a little girl behind him, and looks like a skeleton and vaguely represents death as a concept.
Calling this "plagiarism" would be like saying The Mona Lisa ripped off Light in August because they both have girls in them despite being two legitimately different art mediums.