Raiders, Vol. 1 — JinJun Park

Irel Clark is a professor's assistant whose latest find is the "Holy
Grail" for member of his profession-literally! But when it turns out
that some decidedly unholy individuals are also after the blood of
Christ, Irel must drink from the chrism bottle he's recovered to save
his own life. Immortality leaves something to be desired, though, when
undead cannibals walk the earth in constant need of human flesh, and
Irel's newly immortal body is nothing short of an all-you-can-eat
buffet!