He has officially been renamed Dr. Desolation (thx .Shiver. for the name suggestion)

Idea: An enemy of Nata

Why exactly would they be enemies?

Nata is the nature herself, being nature she sadly has to spread disease. Dr. Desolation wants to cure all disease

Well, he mostly was trying to cure the Black Death, as he lived in the 1300s. But after creating his time travel potion he set his goals on time travelling instead

Death: I know how you feel...