Was it killed?
Was the Undead Skeletal Dragon Garcia killed?
It's only been a few days, and the Intern Reaper he signed a contract with was killed?
The strength of the Undead Skeletal Dragon Garcia was not weak, just how powerful must the opponent be for the Undead Skeletal Dragon Garcia to die without being able to send a distress signal?
Instant kill?
The moment they met, they killed the Undead Skeletal Dragon?
Was it one of those powerful creatures from the Underworld that remained unknown?
Or was it a Holy Knight or an ascetic from a temple who made a move and killed the Intern Reaper he just signed?
Whoever it was, killing the Intern Reaper he signed would have to accept the judgment of both him and Hell.