I Am The Shadow Reverend is a Manga/Manhwa/Manhua in english language, Manhua series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Crossing parallel worlds where games and reality merge, with ferocious beasts rampant and different races running amok. In the wilderness, there are numerous instances and secret realms where humans can awaken to various professions, striving to kill monsters and level up. On the day Lin Luo awakens to his profession, he discovers he has awakened as a priest, the most popular but with no combat abilities. Just as he is conflicted, he realizes his skills have unexpectedly mutated! Healing spells turn into bleeding spells? Blessings morph into curses? But I'm really supposed to be a healing priest!